Statistic Questions
Review the three “Non-parametric” test videos in the Calculations section of the “Statistics Visual Learner” media piece.
1. A researcher is examining preferences among four new flavors of ice cream. A sample of n = 80 people is obtained. Each person tastes all four flavors and then picks a favorite. The distribution of preferences is as follows. Do these data indicate any significance preferences among the four flavors? Test at the .05 level of significance.
Ice Cream Flavor
A B C D
12 18 28 22
2. Is it true that parametric tests are generally more powerful than nonparametric tests? If so, give two reasons why you might choose to use a nonparametric test instead of a parametric test.
