Use the one-standard-deviation 2-test and the one-standard-deviation 2-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval for a sample of size n=9 with a standard deviation of s=3.

a.

H0: =4, Ha:

b.

90% confidence interval

Make a conclusion based on these results. Choose the correct answer below.

A.

Donotreject H0. The test statistic is less than or equalto the critical value.

B.

Reject H0. The test statistic is greaterthan the critical value.

C.

Reject H0. The test statistic is less than orequalto the critical value.

D.

Donotreject H0. The test statistic is greater than the critical value.

B. The 90% confidence interval is from ____ to ____.

\f