Question: Breakstone Company makes whipped butter and whipped margarine. A company market analyst wanted to test whether people prefer the taste of one of these products over the other. A random sample of consumers was selected, and each one was asked to taste both the butter and the margarine and then state a preference. The data is as follows, is there evidence that one of the two products preferred over the other?

(M for margarine and B for Butter) M,B,B,B,M,B,B,M,B,B,B,B,M,M,B,M,M,M,B,B,M,B,B,B,B,(NO PREF.),M,B,B,B,B,(NO PREF.), M,M,M,B,M,B,B,B,B,B,M,B.