Fifteen people were given two types of cereal, Brand X and Brand Y. Two people preferred Brand X and thirteen people preferred Brand Y. We want to determine whether or not customers prefer one brand over the other. The p-value for this test is
A) .0005.
B) .001.
C) .0037.
D) .0074.

Question

Quizplus · Accepted Answer

The p-value of .0074 suggests that there is a statistically significant preference for one brand over the other, given the large difference in preference (13 vs. 2) among the 15 people surveyed. This p-value indicates the probability of observing such a difference (or more extreme) by chance if there were actually no preference between the two brands.

Fifteen People Were Given Two Types of Cereal, Brand X