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 left-tailed test.
A) $\pm 1.96$
B) $- 1.645$
C) $- 1.96$
D) $\pm 1.645$

Question

Quizplus · Accepted Answer

For a left-tailed test with $\alpha = 0.05$, the critical z value is $-1.645$, which corresponds to the 5th percentile of the standard normal distribution.

Assume That the Data Has a Normal Distribution and the Number