The rejection region for testing H₀: μ = 80 vs.H₁: μ 1.96 B)z 1.28 D)z

Question

The rejection region for testing H₀: μ = 80 vs.H₁: μ < 80,at the 0.10 level of significance is: A)z > 1.96 B)z < 0.90 C)z > 1.28 D)z < −1.28

Quizplus · Accepted Answer

Since the alternative hypothesis is one-tailed and specifies that the mean is less than 80, we need to find the z-score that corresponds to the 10th percentile of the standard normal distribution. This is approximately -1.28, so the rejection region is z < -1.28. Therefore, the answer is D.

The Rejection Region for Testing H0: μ = 80 Vs

The Rejection Region for Testing H₀: μ = 80 Vs