Remember the Little League instructional video discussed in Chapter 23? Ads claimed it would improve the performances
Question:
Remember the Little League instructional video discussed in Chapter 23? Ads claimed it would improve the performances of Little League pitchers. To test this claim, 20 Little Leaguers threw 50 pitches each, and we recorded the number of strikes. After the players participated in the training program, we repeated the test. The table shows the number of strikes each player threw before and after the training. A test of paired differences failed to show that this training improves ability to throw strikes. Is there any evidence that the effectiveness of the video (After - Before) depends on the player's initial ability to throw strikes (Before)? Test an appropriate hypothesis and state your conclusion. Propose an explanation for what you find.
Step by Step Answer:
Stats Data And Models
ISBN: 662
4th Edition
Authors: Richard D. De Veaux, Paul D. Velleman, David E. Bock