Chapter 12.2, Problem 79E

In each of Exercises 12.79–12.84, we have given the number of successes and the sample size for a simple random sample from a population. In each case, do the following.

1.                                                             a.      Determine the sample proportion.
2.                                                             b.      Decide whether using the one-proportion z-test is appropriate.
3.                                                              c.      If appropriate, use the one-proportion z-test to perform the specified hypothesis test.

12.79 x = 8, n = 40, H₀: p = 0.3, H_a: p < 0.3, α = 0.10