Describe why and when t statistic is used in constructing  a confidence interval for the mean of a population.

Describe why and when t statistic is used in constructing  a confidence interval for the mean of a population.

Using your textbook, research, and your study notes, answer the following questions that deal with confidence interval construction and explain the content in detail, including calculations.

Be sure to include in-text citations and peer reviewed references in APA format in your discussion post.

  1. Provide an explanation of   the confidence interval and confidence level.
  2. Determine in what  situations you can use the z  statistic to construct a confidence interval for the mean of a population.
  3. Verify what test statistic  is used for constructing a confidence interval on the population’s   proportion.
  4. Describe why and when t statistic is used in constructing  a confidence interval for the mean of a population.
  5. Read the case study “Pointsec Mobile Technology” on page  439 of Zikmund et al. (9th ed.) textbook (Chapter 17) and provide detailed answers to the questions asked.

Make sure to provide numerical examples for questions 1-4 and include in-text citations and peer reviewed references in APA format.

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