Question: Problem 11.24

A random sample of n = 9 men between 30 and 39 years old is asked to do as many sit-ups as they can in one minute. The mean number is \(\bar{X}\) = 26.2, and the standard deviation is s = 6.

a.) Find the value of the standard error of the sample mean. Write a sentence that interprets this value.

b.) Find a 95% confidence interval for the population mean.

c.) Write a sentence that interprets the confidence interval in the context of this situation.