17. Suppose that you are testing the hypotheses 16 vs. A sample of size 25 results in a sample mean of 16.5 and a standard deviation of 2.0.

a) What is the standard error of the mean?

b) What is the critical value of t* for a 90% confidence interval?

c) Construct a 90% confidence interval for

d) Based on the confidence interval, at can you reject Explain.