For Exercises perform each of the following steps.
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results.

Use diagrams to show the critical region (or regions), and use the traditional method of hypothesis testing unless otherwise specified.

State whether the null hypothesis should be rejected on the basis of the given P-value.
a. P-value = 0.258, a = 0.05, one-tailed test
b. P-value = 0.0684, a = 0.10, two-tailed test
c. P-value = 0.0153, a = 0.01, one-tailed test
d. P-value = 0.0232, a = 0.05, two-tailed test
e. P-value = 0.002, a = 0.01, one-tailed test