The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past few years. It is estimated that approximately 90% of students now own a cell phone. Fifteen students are to be selected at random from a large university. Assume that the proportion of students who own a cell phone at this university is the same as nationwide. Let X = the number of students in the sample of 15 who own a cell phone. What is the appropriate distribution of X? Select one: a. X is Bin(15, 13.5)
b. X is Bin(15, 0.9)
c. X is N(15, 0.9)
d. X is N(13.5, 1.16)