Suppose that the probability that a person between the ages of 19 and 24 buys at least one tabloid magazine per week is 0.115. If 500 randomly selected people between the ages of 19 and 24 were asked "Do you buy at least one tabloid magazine per week?", would you be surprised if 45 or more said yes to this question? Why?
A)Yes, 45 would be an unusually small number of people given the known probability of 0.115.
B)No, 45 is within the expected range of people.
C)Yes, 45 would be an unusually large number of people given the known probability of 0.115.
D)Cannot be determined with the given information.

Question

Quizplus · Accepted Answer

The expected number of people who buy at least one tabloid magazine per week is 500 * 0.115 = 57.5. Since 45 is within one standard deviation of the expected value, it is not an unusually small or large number.

Suppose That the Probability That a Person Between the Ages