The t-test is used when the number of observations (sample size) in one or both groups is ______ and the population standard deviation is ___________.
A) small; known
B) small; unknown
C) large; known
D) large; unknown

Question

Quizplus · Accepted Answer

The t-test is used for small sample sizes when the population standard deviation is unknown, which allows for the estimation of the standard deviation from the sample itself.

The T-Test Is Used When the Number of Observations (Sample