A test for the population mean $\mu$ produces a test-statistic z = -0.75. The p-value associated with the test is 0.2266 if the test is a left-tail test, it is 0.7734 if the test is a right-tail test, and it is 0.4533 if the test is a two-tail test.

Question

Quizplus · Accepted Answer

The p-value for a left-tail test is the probability of observing a test statistic as extreme as -0.75 or more negative, which is 0.2266. For a right-tail test, it is the probability of observing a test statistic as extreme as 0.75 or more positive, which is 0.7734. For a two-tail test, it is twice the smaller tail probability, which is 0.4533.

A Test for the Population Mean μ\muμ Produces a Test-Statistic Z = -0

A Test for the Population Mean $\mu$ Produces a Test-Statistic Z = -0