Chapter 7, Problem 6CQ

a.

To determine

To identify: The claim and state $H_0$ and $H_a$.

b.

To determine

Whether the hypothesis test is left-tailed, right-tailed or two-tailed and whether to use a z-test, a t-test, or a chi-square test.

c.

To determine

To find: The standardized test statistic chi square and the P-value.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of $\alpha =0.10$.

e.

To determine

To interpret: The decision in the context of the original claim.