To determine the effectiveness of learning a cartwheel bywatching a video, a gymnastics teacher randomly divided 15 novicegymnasts into 3 groups of 5 students each. One group (control)viewed a live demonstration of a cartwheel one time and then wastested. A second group (video) watched a video of a cartwheel 10times, and then was tested. The third group (live) watched 10 livedemonstrations of a cartwheel and then was tested. All 15 subjectswere ranked on their ability to perform the cartwheel with thefollowing results (1 is the highest rank, 15 is the lowestrank).
| Control | Video | Live |
|---|
| 8 | 2 | 1 |
| 12 | 5 | 3 |
| 13 | 7 | 4 |
| 14 | 9 | 6 |
| 15 | 11 | 10 |
1. Test to see if there are significant differences in thegroup’s ability to perform the cartwheel.
2. If significant results are found, perform all 3 post-hoctests and write up the conclusion for each. Which group performedthe best?
