The Freshmen Competed with the Sophomores to See Who Could

Multiple Choice

The freshmen competed with the sophomores to see who could raise the most money by recycling.Each freshman was paired with a sophomore of the same gender.The appropriate design for testing the significance of the difference between the means is

A) related-samples t-test.
B) independent-samples t-test.
C) one-sample t-test.
D) z-test.