When testing a hypothesis about a single mean,if the sample size is 20,and the population standard deviation is unknown,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 unknown and the sample size is small (less than 30), t-test should be used to test the hypothesis about a single mean. Therefore, the correct test statistic to use in this scenario is "t".

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

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