Suppose the round trip airfare between Boston and Orlando follows the normal probability distribution with a mean of $387.20 and a standard deviation of $68.50.What is the probability that a randomly selected airfare between Boston and San Francisco will be more than $450?
A) 0.1788
B) 0.0788
C) 0.3369
D) 0.2033

Question

Quizplus · Accepted Answer

The probability that a randomly selected airfare between Boston and San Francisco will be more than $450 is 0.1788. This is because the z-score for an airfare of $450 is (450 - 387.20) / 68.50 = 0.9167. The probability of a z-score greater than 0.9167 is 0.1788.

Suppose the Round Trip Airfare Between Boston and Orlando Follows