A researcher believes that a new training program will increase test scores.Previous research shows that test scores increase 8 points between the first and second administration of the test being used.This researcher believes his training program will cause a significant increase, beyond the expected 8 points.If a paired-samples t test is used by this researcher, what value would he expect to be at the center of the comparison distribution, a distribution of mean differences?
A) 8
B) 0
C) s divided by the square root of N
D) the sample mean

Question

Quizplus · Accepted Answer

The expected value of the comparison distribution is the mean difference between the two administrations of the test, which is 8 points.

A Researcher Believes That a New Training Program Will Increase