Can you explain if it is 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.
Can you explain if 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
The solution discusses when a nonparametric test is more powerful than parametric test and gives two reasons to justify.