A null and alternative hypothesis for a one proportion z test are given as H₀: p = 0.8, H_a: p

Name: A null and alternative hypothesis for a one proportion z test are given as H 0 : p = 0.8, H a : p < 0.8. This hypothesis test is A)lower-tailed. B)upper-tailed. C)two-tailed. D)these hypotheses are incorrectly stated.
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Question

A null and alternative hypothesis for a one proportion z test are given as H₀: p = 0.8, H_a: p < 0.8. This hypothesis test is A)lower-tailed. B)upper-tailed. C)two-tailed. D)these hypotheses are incorrectly stated.

Quizplus · Accepted Answer

The alternative hypothesis $H_a: p < 0.8$ indicates that the test is looking for evidence that the proportion is less than 0.8, which defines a lower-tailed test.

A Null and Alternative Hypothesis for a One Proportion Z