The data from an independent-measures research study produce a sample mean difference of 4 points and a pooled variance of 18.If there are n = 4 scores in each sample,what is the estimated standard error for the sample mean difference?
A)3
B)9
C)12
D)The square root of 12

Question

Quizplus · Accepted Answer

The estimated standard error for the sample mean difference is the square root of the pooled variance divided by the square root of the sample size. In this case, the pooled variance is 18 and the sample size is 4, so the estimated standard error for the sample mean difference is the square root of 18 divided by the square root of 4, which is 3.

The Data from an Independent-Measures Research Study Produce a Sample