Wednesday, December 25, 2019
The Bell Jar, by Sylvia Path and Lucy, by Jamaica Kincaid
Women havenââ¬â¢t always had the freedom that they have today. Women were supposed to live a certain life even though sometimes they didnââ¬â¢t want to. They had to tend to their husbands at all time, stay home and do housework while still taking care of their children or being pregnant. Women were abused physically, emotionally, and psychologically. Although women were perceived to act and present themselves in a certain way, some young women went against the cult of the true woman hood not only to be different, but to escape he physical, emotional, and psychological abuse that they will or have encountered. In novels, The Bell Jar, by Sylvia Path and Lucy, by Jamaica Kincaid both young women have the similarity to rebel against the cult of trueâ⬠¦show more contentâ⬠¦While at home, Esther becomes into a deep depression when thinking about her experience in New York. She doesnââ¬â¢t want to read, write, or sleep and she stops bathing herself. Her mother sends her to see Dr. Gordon who is her first psychiatrist whom she doesnââ¬â¢t like and doesnââ¬â¢t trust. He is the man with a good looking family, and to Esther he is conceited. He doesnââ¬â¢t help Esther, but only hurts her more. He prescribes her with shock treatment. After this horrifying experience, she decides to kill herself. She tries to slit her wrists, but can only bring herself to slicing her calf. She tries to hang herself but canââ¬â¢t find a place to tie the rope, she tries to drown herself at the beach, but cannot keep herself under water, and then she crawls into a space in the basement and takes a lot of sleeping pills. ââ¬Å"Wherever I satââ¬âon the deck of a ship or at a street cafà © in Paris or Bangkokââ¬âI would be sitting under the same glass bell jar, stewing in my own sour air.â⬠(Plath pg. 117) This quote shows how she felt trapped in the bell jar, and her suicidal urges began. She awakes in the hospital to find that her attempt at suicide wa snââ¬â¢t successful. She is sent to another psychological ward where she still wants to end her life. Esther becomes very paranoid and uncooperative. She gets moves to a private hospital paid for by Philomena Guinea a famous novelist. Esther improves and gets a new
Tuesday, December 17, 2019
Essay about Yaegerââ¬â¢s Critique of Chopinââ¬â¢s The Awakening
Yaegerââ¬â¢s Critique of Chopinââ¬â¢s The Awakening In ââ¬Å"ââ¬ËA Language Which Nobody Understoodââ¬â¢: Emancipatory Strategies in The Awakening,â⬠Patricia Yaeger questions the feminist assumption that Edna Pontellierââ¬â¢s adulterous behavior represent a radical challenge to patriarchal values. Using a deconstructionist method, Yaeger argues that in the novel adultery functions not as a disrupting agent of, but, rather, as a counterweight to the institution of marriage, reinforcing the very idea it purports to subvert by framing female desire within ââ¬Å"an elaborate code [of moral conduct] that has already been negotiated by her society.â⬠A reading of The Awakening that can envision only two possible outcomes for its heroine ââ¬â acquiescence to her role asâ⬠¦show more contentâ⬠¦Yaeger takes issue with Tannerââ¬â¢s contention that extramarital desire functions in the 18th and 19th century novel as ââ¬Å"an attackâ⬠on the rules governing ââ¬Å"the opposed demands of private desire and public law,â⬠rules that are ââ¬Å"mediatedâ⬠by the institution of marriage. (Tanner 13) While Yaeger agrees with Tanner that adulterous behavior by literary heroines does challenge one expression of patriarchy, Yaeger characterizes this challenge as only ââ¬Å"mildly transgressive,â⬠noting that ââ¬Å"adultery remains well within the arena of permissible social trespass.â⬠According to Yaeger, Ednaââ¬â¢s falling in love with Robert Lebrun is an act of social misconduct that is easily imagined by, and indeed is anticipated by, the bourgeois Creole society she inhabits. Thus, Tanner errs when he equates adultery in the novel with ââ¬Å"the possible breakdown of all the mediations on which society itself dependsâ⬠; rather, Yaeger notes, for Edna ââ¬Å"the thought or practice of adulteryâ⬠¦is actually a conservative gesture within the larger scheme of things, another mode of social acquiescence.â⬠Indeed,
Monday, December 9, 2019
Quick Survey on Cloud Computing â⬠Free Samples to Students
Question: Discuss about the Quick Survey on Cloud Computing. Answer: Introduction: Cloud Computing has able to grab the attention in the market by the business organization. The trend of the Cloud Computing has been increasing among the operational management of the business organization. This have helped in implementing the cloud services in the business organization. The concept of the cloud computing has been discussed with its benefits in the business organization (Almorsy, Grundy Ibrahim, 2014). Various cloud models are properly explained with diagrams. However, development of the cloud services have given rise different cyber threats in the business organizations. This security threats are discussed with proper solution to it. Cloud Computing is a set of resources, which is in demand in the market. Different new ways of business and services are proposed by the Cloud Computing. Therefore, this innovation have provided various opportunities and changes in the operation of the business organization. It has provided distributed data centers all over the world. The cloud computing have helped in creating a virtual world of services and proper delivery of it. Different companies are providing cloud-computing services including Google Engine, Oracle Cloud, Amazon Web Services and Office 365 (Almorsy, Grundy Muller, 2016). These companies have successfully provided cloud services to different organizations and users in all over the world. Cloud computing have created a web based network that initializes different online services to customers and organizations all over the word. Cloud Computing is distributed architecture, which helps in centralizing server resources on scalable platform and provide on demand com puting resources. Cloud computing helps in providing in demand service to the customers. The hackers access databases in cloud environments with the help of hacking techniques including session hijacking and network channel eavesdropping. Cloud computing has accelerate the growth of the company by empowering the workforce and transforming the business operations. The solutions have been developed by the cloud computing that signifies the vision of the company with maximum flexibility and minimum risk (Au, Fung Tses, 2016). Most of the business organizations are using the cloud services to meet requirements of the clients and employees of the company. There are has been logical progression in demand of cloud computing in market. Features of Cloud Computing There are various features of the cloud computing that are discussed below: The cloud computing has able to provide on demand services to the customers. The availability of cloud services have helped in meeting the requirements of the customers in market. The cloud computing services are available and accessible from any part of the world. Therefore, it helps in providing location independent services all over the world. The resources of the cloud computer can be accessed from anywhere on the demand of the user. The cloud computing have able to provide elasticity in its services by scaling up and down to minimize the time required for availing the resources of cloud computing. The cloud services that are shared with public and can be modified and accessed by any user is known as public cloud (Almorsy, M; Grundy, J; Muller, 2016). The data and information stored in the pubic cloud can be used by any user in the organization. Therefore, the security in the public cloud is preferably less than other cloud types. This type of the cloud provide the most secured services to the customers. The data and information stored in the private cloud is not shared with other parties (Hussain et al., 2017). This cloud might be organized by an organization for storing their private and important documents and information over the cloud. The private cloud is an expensive service due to its high security systems. Hybrid cloud is combination of different cloud architecture including public, private and community cloud. Different organization use this type of cloud according to their needs. Some data and information are shared with the customers and employees that are stored in the public cloud (Abdallah et al., 2017). The confidential data and information are stored in private cloud. Therefore, organization have flexibility of using their own cloud architecture according to their needs. The community cloud deals with the sharing of the cloud services between the organizations of the same community. This cloud is maintained by third party or by organization (Demchenko et al., 2017). The community cloud infrastructure can be internally and externally fixed that helps in providing the cloud services to the community. Community cloud consumers look for economies of scale while at same time minimizing costs related with private clouds or hybrid clouds and public clouds Service Model of Cloud Computing Cloud computing services models helps in providing various services to the customers and organization according to their needs and requirements. The common service models of cloud computing are discussed below: User used to avail all the infrastructure of the computer system through internet. This service is known as Infrastructure as a service (IaaS). There are various web based databases and architectures provided by cloud computing that helps in meeting the infrastructural requirement of user and organization (De Carvalhoet al., 2017). Therefore, the cloud computing has able to provide database, backups, networks and other infrastructural facility to the companies through internet. This has increased the versatility of the cloud computing in the computer organization. The benefit of the IaaS is that the user only pay for actual use of infrastructure. Platform-as-a service (PaaS) helps in providing platform where any software can be made, modified and executed for testing purpose. This platform can help in operating the entire life cycle of the software. The service model is suitable of application developers, testers and administrators in an organization. PaaS includes the environment for developing, compiling, testing and programming languages for modifying the required changes in the software (Perez Kumar, 2017). Therefore, the cloud computing us able to provide these services to the companies at a low cost online. Therefore, the company can use these services online from any server and place. This is one of the most used services used by the users and organization in the market. Various software are costly in the market that a business cannot afford for use. Therefore, cloud computing helps in providing this costly software at a low cost for rent. Various software and applications are rented on a monthly basis as per the requirement of the company in the market. Therefore, this reduces the initial cost of the company for stating the business (Burns et al., 2017). For example, Gmail is a SaaS provider that helps in providing free storage up to a limit for the users. SaaS helps in eliminating all the possibilities of installing and maintaining software and application for organization. Therefore, it helps in reducing the cost of the software for organization in the market. Market Size of the Cloud Computing Cloud computing has been enhancing among business organization in the market. According to the study reported by Forbes, global market of enterprise cloud-based services have grown from $12.1 billion in 2010 to $ 35.6 billion in 2015. Growth rate has been 43 % in 2011 and decreased to 13 % over the next five years (Cloud Security Alliance, 2017). SaaS have 70 % revenue in 2010, 30% is related with the IaaS. As per the report of the IDC, revenue from public IT cloud services exceeded $ 16 billion in 2009 to $ 55.5 billion in 2014. The worldwide spending on the pubic cloud services has grown up to 19.4 %. The Compound Annual Growth Rate has been nearly $70 billion in 205 to more than $141 billion in 2019 (Luitinfotech, 2017). Worldwide Public IT Cloud Service Revenue in 2018 is predicted to be $127B. SaaS and PaaS portion of cloud hardware and infrastructure software spending are projected to reach $55 billion in 2026. Cloud Security Issues The use of the cloud computing have helped in development of organizations. However, it has faced various security issues over the internet. Some of the main security issues are discussed below: Confidentiality refers to set of rules and regulation that monitors the working and functionality of the tools and techniques used in the cloud computing these of the security measures for securing data and information has been continuously lacking in case of cloud computing. Therefore, confidentiality refers to securing data and information of customers and organizations in the market. The use of personal information of users is not acceptable in the organization. The security of data and information of customer is the prior thing for organization (Cimler et al., 2015). The cloud computing has helped in storing the personal data over the cloud storage. However, there have been many cases of data breach from the cloud storage over the internet. The security protocol of the cloud computing has been attacked by the hackers over the internet. The cloud computing consist of three layers including Software layer, Platform layer and Infrastructure layer. The Software layer provides interfa ce for user to use services of cloud computing. The platform helps in providing platform and environment for executing software by developer (Coppolino et al., 2017). The infrastructure layer helps in providing the hardware components including network and storage. Therefore, the hackers can attack at any of the three layers for accessing the data and information of the company over the cloud. The storage of the data an information at the remote location with the help of cloud computing might causes issues in the organization. The location of the data and information is only known by the data owner. Therefore, in the absence of the data owner, data and information is unable to access by the organization in emergency cases (Coughlin, Keller Wustrow, 2017). Therefore, threats to availability of the data and information is prevailing in the organization with use of cloud computing. The cloud computing is responsible for providing on demand services to the customers. Therefore, in the absence of the data owner, it can fulfill the requirement of the clients that violates the Service level Agreement for the cloud computing. The integrity of the data and information is an important in maintaining the database of the cloud. It is good process for storage of data in a secure way persistent data storage, which can be, reclaim or retrieved in same layout, as it was stored later (Dang-Pham, Pittayachawan Bruno, 2017). Therefore, integrity and monitoring of the data and information for minimizing data corruption and data crash in the server. Virtualization and multi tenancy Virtualization and multi tenancy are the two basic factors in use of the cloud computing in the business organizations. The traditional way of hosting applications involves the use of operating system on physical layer. Therefore, thus type of traditional hosting method has been used for creating a functional efficient cloud. These can be achieved with the help of linking multiple servers using Virtual LAN (VLAN) (Dave et al., 2017). However, this process is insecure and inefficient for long term, as huge part of physical hardware is not used. Therefore, Virtualization has helped in maintaining these issues in the cloud computing the Virtual Machine Monitor (VMM) has been created for a single physical server that can host multiple server at a time in the operating system (Mohammad, Kak Alam, 2017). Therefore, a single server can act as multiple processing server at a time. It has enhanced the efficiency of the hardware and enhancing its performance. The virtual layer is also known a s hypervisor. Two ways of using this hypervisor for running virtual machines (VM) (Krishna et al., 2016). These are known as full virtualization and paravirtualization. A VM deployed using full virtualization has emulating BIOS and drives of the OS, in addition to the other functions. There are two architectures for deploying virtual machines hosted architecture. The hosted architecture, the virtual layer is handled by server. The application is charged for keeping up the virtual machines in the operating system. However, the hypervisor architecture skips operating system and runs directly on hardware. Multi tenancy helps in allowing multiple sharing if the computing resources in logical separation of the users in the tenant of a system. In the context of cloud computing, each virtual machines are consider as a tenant of the system (Lin Liao, 2017). Multi tenancy is not limited to the multiple virtual machines that are running in the same hardware. Software and applications are able to use multiple tenants for enhancing the efficiency of the virtual machines in the operating system. In IaaS cloud models, users create new drives on virtual machines and store data on those drives (Luna et al., 2017). However, data in all three-cloud models can be accessed by unauth orized employees and external hackers. Data Encryption Schemes Various security issues discussed in the earlier sections. However, there are some solutions for mitigating the issues in the cloud computing related to security of the data and information. The Proxy Re-encryption is cryptographic scheme that translate cipher texts from one encryption key to another key. After that, PRE forwards encrypted messages without showing clear text to the potential users. A proxy re-encryption algorithm translates a cipher text under a public key PKa to cipher text PKb along with re-encryption key RK A B. In this encryption scheme, IP address or email addresses can be used to formulate public keys for users. The sender uses recipients identity as the public key to encrypt messages in identity based encryption technique. The proxy requires proxy keys, or re-encryption keys, to perform translations without being reading original message (McCormac et al., 2017). The IBE technique has various practical applications including attribute-based delegations, secure email forwarding, and access control in networked file storage. This encryption scheme deals with a proxy server that helps in maintaining additional information that can be transform into cipher text under various attributes into a new cipher text on the same message. Therefore, the data provider might get the original text that helps in sharing the cipher text in the message. In this scheme, private key user has an asset of attributes that helps in providing encrypted cipher text that might specify an access policy (Modi et al., 2013). In this scheme, the data is encrypted in the storage on various server that helps in maintaining back up for the original text and message. In a key private PRE, the proxy and set of users are never derived by message recipient from cipher text and public keys. This scheme helps in helps in providing key privacy for proxy re-encryption schemes in which proxy performs all translations that cannot distinguish the identities of participating parties (Mishra, 2017). It can be concluded that the use of the cloud computing in the business organization have helped in maintaining the development of the organization. The benefits of cloud computing has been discussed properly. The growth of cloud computing in market has been rapid due to its on demand services provided to the customers. The use of the cloud computing has helped in maintaining the business goals and objectives of the company in market. The security and privacy of the data and information has been properly maintained by the cloud computing by using various strategies. The virtualization technique in the operating system has helped in enhancing hardware of the computer system. The use of the virtualization process has helped in maintaining the performance if the operating system in the computer system. Various encryption technique has been discussed in the assignment for mitigating the security issues in the cloud computing. References Abdallah, E. G., Zulkernine, M., Gu, Y. X., Liem, C. (2017, July). TRUST-CAP: A Trust Model for Cloud-Based Applications. In Computer Software and Applications Conference (COMPSAC), 2017 IEEE 41st Annual (Vol. 2, pp. 584-589). IEEE. Almorsy, M., Grundy, J., Ibrahim, A. S. (2014). Adaptable, model-driven security engineering for SaaS cloud-based applications. Automated software engineering, 21(2), 187-224. Almorsy, M; Grundy, J; Muller, I. (2016). An analysis of the cloud computing security problem. arXiv preprint arXiv:1609.01107. Au, C. H., Fung, W. S., Tses, A. (2016). An investigation on the relationship between control self-assessment, cloud security, and cloud-related business performance-using partial least squares. In Industrial Engineering and Engineering Management (IEEM), 2016 IEEE International Conference (pp. 1879-1883). IEEE. Behl, A., Behl, K. (2012). An analysis of cloud computing security issues. In Information and Communication Technologies (WICT), 2012 World Congress (pp. 109-114). IEEE. Burns, A. J., Posey, C., Courtney, J. F., Roberts, T. L., Nanayakkara, P. (2017). Organizational information security as a complex adaptive system: insights from three agent-based models. Information Systems Frontiers, 1-16. Cimler, R., Matyska, J., Balk, L., Horalek, J., Sobeslav, V. (2015). security issues of mobile application using cloud computing. In Afro-European Conference for Industrial Advancement (pp. 347-357). Springer, Cham. Cloud Security Alliance (CSA)s Security Guidance for Critical Areas of Focus in Cloud Computing (2012). CSA, April 2012. Available Online at: https://cloudsecurityalliance.org/csaguide.pdf. Coppolino, L., DAntonio, S., Mazzeo, G., Romano, L. (2017). Cloud security: Emerging threats and current solutions. omputers Electrical Engineering, 59, 126-140. Coughlin, M., Keller, E., Wustrow, E. (2017). Trusted Click: Overcoming security issues of NFV in the Cloud. In Proceedings of the ACM International Workshop on security in Software Defined Networks Network Function Virtualization (pp. 31-36). ACM. Dang-Pham, D., Pittayachawan, S., Bruno, V. (2017). Why employees share information security advice? Exploring the contributing factors and structural patterns of security advice sharing in the workplace. Computers in Human Behavior, 67, 196-206. Dave, D., Meruliya, N., Gajjar, T. D., Ghoda, G. T., Parekh, D. H., Sridaran, R. (2017). Cloud security Issues and Challenges. In Big Data Analytics (pp. 499-514). Singapore: Springer. De Carvalho, C. A., de Castro Andrade, R. M., de Castro, M. F., Coutinho, E. F., Agoulmine, N. (2017). State of the art and challenges of security SLA for cloud computing. Computers Electrical Engineering. Demchenko, Y., Turkmen, F., Slawik, M., de Laat, C. (2017). Defining Intercloud security Framework and Architecture Components for Multi-Cloud Data Intensive Applications. In Cluster, Cloud and Grid Computing (CCGRID), 2017 17th IEEE/ACM International Symposium (pp. 945-952). IEEE. Hussain, S. A., Fatima, M., Saeed, A., Raza, I., Shahzad, R. K. (2017). Multilevel classification of security concerns in cloud computing. Applied Computing and Informatics, 13(1), 57-65. Krishna, B. H., Kiran, S., Murali, G., Reddy, R. K. (2016). security Issues In Service Model Of Cloud Computing Environment. Procedia Computer Science, 87, 246-251. Kshetri, N. (2013). Security and security issues in cloud computing: The role of institutions and institutional evolution. Telecommunications Policy, 37(4), 372-386. Lin, I. C., Liao, T. C. (2017). A Survey of Blockchain security Issues and Challenges. IJ Network security, 19(5), 653-659. Luitinfotech. (2017). Cite a Website - Cite This For Me. Luitinfotech.com. Retrieved 23 November 2017, from https://www.luitinfotech.com/kc/what-is-cloud-computing.pdf Luna, J., Taha, A., Trapero, R., Suri, N. (2017). Quantitative reasoning about cloud security using service level agreements. IEEE Transactions on Cloud Computing. McCormac, A., Zwaans, T., Parsons, K., Calic, D., Butavicius, M., Pattinson, M. . (2017). Individual differences and information security awareness. Computers in Human Behavior, 69, 151-156. Mishra, A. (2017). Cloud Computing Models: Background, Data security, security Issues. Journal of Web Development and Web Designing, 2(1,2). Modi, C., Patel, D., Borisaniya, B., Patel, A., Rajarajan, M. (2013). A survey on security issues and solutions at different layers of Cloud computing. The Journal of Supercomputing, 63(2), 561-592. Mohammad, A., Kak, S. M., Alam, M. A. (2017). Cloud Computing: Issues and security Challenges. International Journal, 8(2). Perez, M., Kumar, S. (2017). A Quick Survey on Cloud Computing and Associated Security, Mobility and IoT Issues. Journal of Computer and Communications, 5(12), 80.
Sunday, December 1, 2019
Story of my life Essay Example
Story of my life Essay The Story of My Life Interesting enough, my life began on a Thursday night, on December 17, 1987 In Atlanta Georgia, where I was delivered at 9. Pm to my mother, Ruth Dye and father, Tony Jiffies. I was the second child for my father and the third for my mother. I Just didnt know anybody or where I would end up In life after that moment. As I grew up, my life changed at each milestone In a person life. I had a rough and very fun childhood. I remember playing outside with family and friends, eating around the dinner table with my family and sleeping with my grandmother until I was 15 years old. My life was filled with more great memories than the bad, even though lived in poverty stricken neighborhood. My grandmother never once, made it seem that way because she made sure we were fed, bathe and had clean clothes and shoes on our feet. Even though, neither my mother nor my father was in my life, when I was younger, my father decided to change that when I was 15 years old. He wanted me to be more than cousins that had three kids on their hips and one on the way. He told me, If you are ready to leave, you can go with me, right now. I was hesitant at first, but I decided this might be my chance to get out of the situation I was In. At that point, my grades had started slipping, I started not to go to school, but I know I TLD want that for myself. I took that leap of faith and I went with my dad and the rest Is still writing its story. We will write a custom essay sample on Story of my life specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Story of my life specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Story of my life specifically for you FOR ONLY $16.38 $13.9/page Hire Writer
Tuesday, November 26, 2019
buy custom Motivation and Emotion essay
buy custom Motivation and Emotion essay Motivation is the answer to such questions as 'Why do you go to school?', 'Why do you perform a certain activity', etc. In general, motivation is defined as a motive that drives us towards a certain goal. It might be an interest, desire, need or want, which actually is so strong that it can direct the person towards a certain move and affect the thinking, cognitive processes and behavior (Cherry, 2014). The researchers stress that motivation has several effects on the processes of thinking and learning, as well as on the way we behave (Ormrod, 2014). First of all, if we are motivated, then we are directed to a certain kind of goal. According to the social cognitive theorists, it is inherent in humans to set goals and then take steps towards reaching them. Each goal has an intrinsic power, which is motivation. The stronger motivation is, the better results will be. It affects choices we made and the way we think and eventually act. Secondly, motivation is in charge of the increased rates of energy and efforts. Motivation indeed affects the amount of energy applied to the activities that are directly related to the goals once set. The enthusiastic pursuit of a task is normal for motivated people. Thirdly, if a person is motivated, then he or she is persistent. Such a person does not take 'no' as an answer and always reaches the goals set. For example, the people who are motivated at the beginning of the executing the order actually want to do the task. Thus, it does not make them tired or exhausted. Instead, it inspires them to new activities. The same applies to the thinking process. It seems that motivation gives people the keys to all secrets of knowledge. In case the person faces any obstacle, he or she continues the search until answer is found. Speaking about thinking, one should remember that any cognitive process is affected by motivation as well. It is the motivation that stands behind the choices we make regarding the things we need to pay attention to or the overall effectiveness of the learning that we want to achieve in the end. The learners who are motivated are usually more persistent in their endeavors to understand the material and to learn it more deeply (Ormrod, 2014). Finally, motivation is the reason for enhanced performance. It is mainly due to the combination of elements discussed above: persistence, energy, goal-oriented behavior, etc. All of it eventually leads to increased performance. Needless to say that unlike the motivation, the concept of emotion is hard to explain. It is even harder to understand. Those who have attempted to explain the term 'emotion' define it as a complex reaction to a certain event both external and internal, which involves the expression of the face, changes in behavior and psychology, cognition, etc. Emotions could serve as protection from danger. For example, when a person fears something, he or she is more likely to avoid the source of the fear or confront it once more. If we experience anger, then we are usually ready to encounter the source that irritates us. Emotions is the necessary adaptation that has been used through the human history and that helps us thrive, survive and avoid any kind of danger. The emotions actually move us. They act as energizers as they occur after specific chemical signals that have been sent to the muscles. The only thing that emotions do not affect in human behavior is habit. We usually do not look twice before sitting down on a sofa, and we do not think twice before we tie shoes. Emotions could be motivating or non-motivating i.e. inspiring (or not) as for the move and approach to something or in terms of avoiding something. Buy custom Motivation and Emotion essay
Saturday, November 23, 2019
Confidence Interval for a Mean When We Know Sigma
Confidence Interval for a Mean When We Know Sigma In inferential statistics, one of the major goals is to estimate anà unknownà populationà parameter. You start with a statistical sample, and from this, you can determine a range of values for the parameter. This range of values is called a confidence interval. Confidence Intervals Confidence intervals are all similar to one another in a few ways. First, many two-sided confidence intervals have the same form: Estimate à ± Margin of Error Second, the steps for calculating confidence intervals are very similar, regardless of the type of confidence interval you are trying to find. The specific type of confidence interval that will be examined below is a two-sided confidence interval for a population mean when you know the population standard deviation. Also, assume that you are working with a population that is normally distributed. Confidence Interval for a Mean With a Known Sigma Below is a process to find the desired confidence interval. Although all of the steps are important, the first one is particularly so: Check conditions: Begin by ensuring that the conditions for your confidence interval have been met. Assume that you know the value of the population standard deviation, denoted by the Greek letter sigma ÃÆ'. Also, assume a normal distribution.Calculate estimate: Estimate the population parameter- in this case, the population mean- by use of a statistic, which in this problem is the sample mean. This involves forming a simple random sample from the population. Sometimes, you can suppose that your sample is a simple random sample, even if it does not meet the strict definition.Critical value: Obtain the critical value z* that corresponds with your confidence level. These values are found by consulting a table of z-scores or by using the software. You can use a z-score table because you know the value of the population standard deviation, and you assume that the population is normally distributed. Common critical values are 1.645 for a 90-percent confidence level, 1.960 for a 95-percen t confidence level, and 2.576 for a 99-percent confidence level. Margin of error: Calculate the margin of error z* ÃÆ' /âËÅ¡n, where n is the size of the simple random sample that you formed.Conclude: Finish by putting together the estimate and margin of error. This can be expressed as either Estimate à ± Margin of Error or as Estimate - Margin of Error to Estimate Margin of Error. Be sure to clearly state the level of confidence that is attached to your confidence interval. Example To see how you can construct a confidence interval, work through an example. Suppose you know that the IQ scores of all incoming college freshman are normally distributed with standard deviation of 15. You have a simple random sample of 100 freshmen, and the mean IQ score for this sample is 120. Find a 90-percent confidence interval for the mean IQ score for the entire population of incoming college freshmen. Work through the steps that were outlined above: Check conditions: The conditions have been met since you have been told that the population standard deviation is 15 and that you are dealing with a normal distribution.Calculate estimate: You have been told that you have a simple random sample of size 100. The mean IQ for this sample is 120, so this is your estimate.Critical value: The critical value for confidence level of 90 percent is given by z* 1.645.Margin of error: Use the margin of error formula and obtain an error ofà z* ÃÆ' /âËÅ¡n (1.645)(15) /âËÅ¡(100) 2.467.Conclude: Conclude by putting everything together. A 90-percent confidence interval for the populationââ¬â¢s mean IQ score is 120 à ± 2.467. Alternatively, you could state this confidence interval as 117.5325 to 122.4675. Practical Considerations Confidence intervals of the above type are not very realistic. It is very rare to know the population standard deviation but not know the population mean. There are ways that this unrealistic assumption can be removed. While you have assumed a normal distribution, this assumption does not need to hold. Nice samples, which exhibit no strong skewness or have any outliers, along with a large enough sample size, allow you to invoke the central limit theorem. As a result, you are justified in using a table of z-scores, even for populations that are not normally distributed.
Thursday, November 21, 2019
Gaining a foot ahead in the athletic industry Assignment
Gaining a foot ahead in the athletic industry - Assignment Example is program expands on the available training opportunities because it allows trainers to be able to understand how to train adults and their learning patterns. However, the trainers might have the desire to learn so as to be able to train others, but the resources provided by the district might not be adequate enough to support this program. This might be a challenge, but it does not necessarily mean that it is unachievable as it is a necessity if the district is to create a professional learning environment. In order to cut on the cost of Training the trainer, it is important for schools to do this internally rather than having to implore the services of outside staff to conduct the training because outsourcing can be an expensive venture. External consultants can offer the same training, but do so at exorbitant rates, meaning that training internally can be the preferable way because it will be able to cut on the costs. Internal training can also provide ongoing support when the trainers are implementing the training program as this can help the educators to make the necessary changes as per the advice the trainers may receive from their trainers. Internal training is also the best way to go because the trainers are more familiar with the school curricular used meaning that they may not find it hard to apply the program as compared to external trainers that may have to understand the curricular before they can commence work (261f). Therefore, internal trainers are able to align professional training with the cultural attributes, policies and curriculum so as to ensure that the program applied becomes a success. Additionally, professional learning also requires that a teacher combines it with instructions so as to be able to support the learning needs of the students and also gauge what they should be taught. In summary, involving external trainers for the Training the trainer program can be expensive and might force a school to increase their school fees,
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