A new program of imagery training is used to improve theperformance of basketball players shooting free-throw shots. Thefirst group did an hour imagery practice, and then shot 30 freethrow basket shots with the number of shots made recorded. A secondgroup received no special practice, and also shot 30 free throwbasket shots. The data are below. Did the imagery training make adifference? Set alpha = .05.
Group 1: 15, 17, 20, 25 26, 27
Group 2: 5, 6, 10, 15, 18, 20
A) 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.
B) Solve for and evaluate the effect size of this study usingCohen's D.
C) Create a 90% confidence interval for this problem.
