Question: A random sample of n=9 men between 30 and 39 years old is asked to do as many situps as they can in one minute. The mean number is 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.