A sample of 39 observations is selected from a normal population. The sample mean is 19, and the population standard deviation is 4. Conduct the following test of hypothesis using the 0.10 significance level.

H0: μ ≤ 18
H1: μ > 18

a. Is this a one- or two-tailed test?

multiple choice 1
One-tailed test
Two-tailed test


b. What is the decision rule?

multiple choice 2
Reject H0 when z > 1.282
Reject H0 when z ≤ 1.282


c. What is the value of the test statistic? (Round your answer to 2 decimal places.)

e-1. What is the p-value? (Round your answer to 4 decimal places.)


e-2. Interpret the p-value? (Round your final answer to 2 decimal places.)