Do store-brand chocolate chip cookies have fewer chips per cookie than Keebler's Chips Deluxe Chocolate Chip Cookies? To find out, a student randomly selected 21 cookies of each brand and counted the number of chips in the cookies. The results are shown next.

(a) Draw side-by-side boxplots for each brand of cookie.
(b) Does there appear to be a difference in the number of chips per cookie?
(c) Does one brand have a more consistent number of chips per cookie?

Keebler 23 28 20 21 24 28 20 Store Brand 23 25 26 16 30 28 32 28 25 28 21 29 24 25 26 24 18 21 21 24 23 31 27 24 27 21 24 17 31 29 21 26