Answering the following including formula references. APA not needed.
Explain what a confidence interval is, and what is the confidence level?
Explain in what situations you can use the z statistic to construct a confidence interval for the mean of a population?
Explain what is the test statistic used for constructing confidence interval on a proportion.
Explain why and when t statistic is used in constructing a confidence interval for the mean of a population.
Sample Solution