Mathematics, 20.02.2020 20:05 anastasialong

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 95% of students now own a cell phone. Twenty five 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 25 who own a cell phone.

What is the standard deviation of the number of students who own a cell phone in simple random samples of 25 students?

a. 1.0897
b. 0.0475
c. 1.1875
d. 1.35

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