A test is made of H0 : = 25 versus H1: < 25. The value
Question:
A test is made of H0 : μ = 25 versus H1: μ < 25.
The value of the test statistic is z = −1.84.
a. Find the critical value and the critical region for a significance level of
α = 0.05.
b. Do you reject H0 at the α = 0.05 level?
c. Find the critical value and the critical region for a significance level of
α = 0.01.
d. Do you reject H0 at the α = 0.01 level?
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