The test of means for two related populations matches the observations (matched pairs)in order to reduce the ________________ attributable to the difference between individual observations and other factors.
A)Means
B)Test statistic
C)Degrees of freedom
D)Variation

Question

Quizplus · Accepted Answer

By using matched pairs, we are able to reduce the variation attributable to factors that may be different between the two populations (e.g. age, gender, location, etc.). Therefore, option D is the correct answer.

The Test of Means for Two Related Populations Matches the Observations