Chapter 9.9, Problem 122E

a.

To determine

Check whether the sample data indicate that the statement is correct.

Test the hypothesis at 5% level of significance and to find the P- value for the test.

b.

To determine

To make conclusions based on the normal approximation for the test $H_0:\tilde{\mu }=7.0\text{ vs }{H}_0:\tilde{\mu }\ne 7.0$ at the level of significance $\alpha =0.05$ and to find the P-value for the test.