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Answer each of the questions in Q&A format in minimum 70 words

Date Posted: 22/04/2019
Category: Business
Due Date: 22/04/2019
Instruction
1. Write a response to the following statement A z test is a hypothesis test that uses normal distribution. When having more than 30 samples it allows you to get a better understanding if the numbers are repeatable or possible. The t test is inferential statistics to test the null hypothesis. It is also used with normal distribution if the value of the tests are known on the scale. An example where a T test could be used that I have worked at is in Target there was major stress put out based upon Target cards so they had to figure out two types of people. One that supported it and one that did not. The Z test was used when as a director of a Hampton to know the fairness of something in the business based upon your employee judgement. 2. Write a response to the following statement: The most interesting and important part for conducting statistical hypotheses testing is choosing the appropriate level of significance or alpha levels. The alpha level is a threshold value to judge whether a test statistic is statistically significant. It represents an acceptable probability of a Type I error in a statistical test (Lavrakas, 2008). Choosing a level of significance in research is actually a complex process. There are factors that needed to be considered but I think the most important thing to consider is the consequences of committing the errors. For instance, we can noticed that medical field researchers uses smaller alpha levels compared to business researchers or social science researchers. In my opinion, these significance levels make sense because in most cases, the consequences in medical research is worse compared to other fields. The consequences of the 5% error in child’s education is tolerable than in medical research where mostly involve chemical treatments applied to human subjects and possible consequences of this medical errors are sickness or death. References Lavrakas, P. (2008). Alpha, Significance Level of Test. Retrieved from SAGE Research Methods: http://methods.sagepub.com/reference/encyclopedia-of-survey-research-methods/n13.xml
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