Data collected from a class experiment on the "Misleading Postevent Information" (MPI) effect are listed here. Participants in the study were randomly assigned to the "Smashed" condition or the "Hit" condition. Column B shows the miles per hour estimates for the participants who were asked: "How fast were the cars going when they smashed into each other?" Column D has the same data for the participants who were asked: "How fast were the cars going when they hit each other?" (Participants were asked to estimate to the nearest 5 mph.)

The claim is that subjects who hear the word "smashed" in the question will report a higher mean miles per hour estimate than those who hear the word "hit." Perform an 8-step hypothesis test to test the claim. Use = .05.

"Smashed" 30 25 45 35 25 20 20 40 30 45 35 30 35 30 35 20 40 20

"Hit" 5 15 25 25 45 35 40 20 40 25 25 15 20 20 15 20 20 35 30 35 25