Fifteen People Were Given Two Types of Cereal, Brand X

Multiple Choice

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. To test the null hypothesis, the appropriate probability distribution to use is

A) normal.
B) chi-square.
C) Poisson.
D) binomial.