Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.
-$\alpha = 0.05$ for a two-tailed test.
A) $\pm 1.645$
B) $\pm 1.96$
C) $\pm 1.764$
D) $\pm 2.575$

Question

Quizplus · Accepted Answer

For a two-tailed test with $\alpha = 0.05$, the critical z values are $\pm 1.96$ because the significance level is split between the two tails of the normal distribution.

Assume That the Data Has a Normal Distribution and the Number