Given the length an athlete throws a hammer is a normal random variable with mean 50 feet and standard deviation 5 feet,what is the probability he throws it: No less than 55 feet?
A).8413
B).1587
C).6826
D).3174

Question

Quizplus · Accepted Answer

The probability of throwing no less than 55 feet is the same as the probability of throwing more than 55 feet. We calculate the z-score: (55-50)/5 = 1. The probability of a z-score greater than 1 is 1 - 0.8413 = 0.1587.

Given the Length an Athlete Throws a Hammer Is a Normal