19. Raisins The numbers of raisins in each of 14 miniboxes (14-gram size) were counted for a generic brand and for Sunmaid® brand raisins

a. Although counts cannot have a normal distribution, do these data have approximately normal distributions?
(hint: Use a histogram or stem and leaf plot.)

b. Are you willing to assume that the underlying population variances are equal? Why?

c. Use the p-value approach to determine whether there is a significant difference in the mean numbers of raisins per minibox. What are the implications of your conclusion?

Transcribed Image Text:

Generic Brand Sunmald 25 26 26 28 26 27 24 222 25 28 222 28 25 27 28 25 26 26 1828 25 28 2222 29 24 24 28 28 30 222 24 27 24