When testing a hypothesis about a single mean,if the sample size is 51,and the population standard deviation is known,the correct test statistic to use is ___________.
A)$\chi$
B)Z
C)t
D)p-value

Question

Quizplus · Accepted Answer

If the population standard deviation is known and the sample size is greater than 30, we can use the Z-test to test the hypothesis about a single mean. Since the sample size is 51, which is greater than 30, and the population standard deviation is known, the correct test statistic to use is Z.

When Testing a Hypothesis About a Single Mean,if the Sample χ\chiχ

When Testing a Hypothesis About a Single Mean,if the Sample $\chi$