People are randomly assigned to take an exam in a noisy condition or a quiet condition. The test is whether people in the noisy condition will score lower than people in the quiet condition. Use the p < .05 significance level to test this hypothesis.

Did noise reduce performance in this study? Use the Five Steps of Hypothesis Testing to answer this question.

Here are the data:

Noisy Condition

17, 15, 16, 20

Quiet Condition

22, 20, 23, 21, 19

F test (Analysis of Variance (ANOVA))

22.A sports researchergave a test of eating habits to 12 professionals, four each from baseball, football, and basketball.

The means and estimated population variances for the three groups were:

Baseball Players: M = 34.5; S squared (Variance)= 461.67

Football Players: M = 41; S squared (Variance)= 347.33

Basketball Players: M = 46.75; S squared (Variance)= 116.25

Is there a difference in eating habits among professionals in the three sports?

Use the Five Steps of Hypothesis Testing and the .05 significance level.

23. Was your t test for independent means significant? Why or why not?

24. Was your Analysis of Variance F test significant? Why or why not?