To compute a two-independent-sample t test,a researcher has to know many values.Which of the following is NOT a value that the researcher must know to compute this test?
A) the pooled sample variance
B) the pooled population variance
C) the sample size for both samples
D) the sample mean for both samples

Question

Quizplus · Accepted Answer

The pooled population variance is not a value that the researcher must know to compute a two-independent-sample t test. The researcher needs to know the sample size, sample mean, and pooled sample variance for both samples. The population variance is typically unknown, and the researcher estimates it using the sample variance.

To Compute a Two-Independent-Sample T Test,a Researcher Has to Know