To compute a related-samples 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 estimated standard error for difference scores
B) the population variance of difference scores
C) the sample size or number of pairs of scores
D) the sample variance of difference scores

Question

Quizplus · Accepted Answer

The population variance of difference scores is not necessary for computing a related-samples t test as it is typically not known. Instead, the researcher estimates the variance using the sample variance of difference scores. The other values listed (estimated standard error for difference scores, sample size or number of pairs of scores, and sample variance of difference scores) are all necessary for the computation of the related-samples t test.

To Compute a Related-Samples T Test,a Researcher Has to Know