Problem 1: A new program of imagery training isused to improve the performance of basketball players shootingfree-throw shots. The first group did an hour imagery practice, andthen shot 30 free throw basket shots with the number of shots maderecorded. A second group
received no special practice, and also shot 30 free throw basketshots. The data are
below. Did the imagery training make a difference? Set alpha =.05.
Group 1: 15, 17, 20, 25 26, 27
Group 2: 5, 6, 10, 15, 18, 20
1. You must use all five steps in hypothesis testing:
- Restate the question as a research hypothesis and a nullhypothesis about the populations.
- Determine the characteristics of the comparisondistribution.
- Determine the cutoff sample score on the comparisondistribution at which the null hypothesis should be rejected.
- Determine your sample’s score on the comparisondistribution.
- Decide whether to reject the null hypothesis.
2. Solve for and evaluate the effect size of this study usingCohen's D.
3. Create a 90% confidence interval for this problem.
