# Question

a. Given the following information, determine the 98% confidence interval estimate of the population mean:

b. Repeat part (a) using a 95% confidence level.

c. Repeat part (a) using a 90% confidence level.

d. Review parts (a)–(c) and discusses the effect on the confidence interval estimator of decreasing the confidencelevel.

b. Repeat part (a) using a 95% confidence level.

c. Repeat part (a) using a 90% confidence level.

d. Review parts (a)–(c) and discusses the effect on the confidence interval estimator of decreasing the confidencelevel.

## Answer to relevant Questions

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