The test statistic for a two-sided significance test for a population mean is z = -2.12.What is the corresponding P-value?
A)0.017
B)0.034
C)0.483
D)0.983

Question

Quizplus · Accepted Answer

The P-value for a two-sided test is found by doubling the one-sided P-value corresponding to the z-score. For z = -2.12, the one-sided P-value is approximately 0.017 (from standard normal distribution tables or a calculator). Therefore, the two-sided P-value is 2 * 0.017 = 0.034.

The Test Statistic for a Two-Sided Significance Test for a Population