Test Hypotheses about a Population Mean with Known Using the Classical Approach
-In a two-tailed test of a hypothesis using the classical method, the critical value is denoted by
A) $\mathrm { z } _ { \alpha / 2 }$
B) $\mathrm { z } _ { \alpha }$
C) $\alpha$
D) $\alpha / 2$

Question

Quizplus · Accepted Answer

In a two-tailed test, the critical value is denoted by $\mathrm { z } _ { \alpha / 2 }$ because the significance level $\alpha$ is split between the two tails of the distribution.

Test Hypotheses About a Population Mean with Known Using the Classical