A Company Which Designs Sports Shoes Has Made an Improvement

A company which designs sports shoes has made an improvement to their popular running shoe. They hope that athletes wearing the new running shoe will be able to run faster over short
Distances. They will use a paired sample to determine whether the mean time to run 100 meters for
Sprinters wearing the new running shoe is less than the mean time to run the 100 meters for
Sprinters wearing the old running shoe. Identify the pairs for the proposed hypothesis test.

A) Each pair consists of a sprinter wearing the new running shoe and the same sprinter after a training period.
B) Each pair consists of a sprinter wearing the old running shoe and the same sprinter wearing the new running shoe.
C) Each pair consists of a randomly selected sprinter wearing the old running shoe and a randomly selected sprinter wearing the new running shoe.
D) Each pair consists of a sprinter wearing the new running shoe and his or her time to run the 100 meters.