The rejection region for testing the hypotheses $H _ { 0 } : \mu =$ 80. $H _ { 1 } : \mu$ 1.96. B) z -1.65. D) z

Question

The rejection region for testing the hypotheses $H _ { 0 } : \mu =$ 80. $H _ { 1 } : \mu$ < 80. at the 0.10 level of significance is: A) z > 1.96. B) z < 0.90. C) z > -1.65. D) z < -1.28.

Quizplus · Accepted Answer

The rejection region for a left-tailed test at the 0.10 level of significance corresponds to a critical value of -1.28 (found using a standard normal distribution table or calculator). Any test statistic (z-score) that falls in the rejection region, which in this case is z < -1.28, will lead to rejection of the null hypothesis in favor of the alternative hypothesis. Therefore, the correct answer is D, as it represents the rejection region for this hypothesis test.

The Rejection Region for Testing the Hypotheses H0:μ=H _ { 0 } : \mu =H0​:μ=

The Rejection Region for Testing the Hypotheses $H _ { 0 } : \mu =$