Question: A test is made of H0 : = 15 versus H1: > 15. The sample mean is x = 16.5, the sample size

A test is made of H0 : μ = 15 versus H1: μ > 15.

The sample mean is x̄ = 16.5, the sample size is n = 50, and the population standard deviation is σ = 5.

a. Find the value of the test statistic z.

b. Find the critical region for a level α = 0.05 test.

c. Do you reject H0 at the α = 0.05 level?

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