Pulse rates of adult men are approximately normal with a mean of 70 and a standard deviation of 8. Which choice correctly describes how to find the proportion of men that have a pulse rate greater than 78?
A) Find the area to the left of z = 1 under a standard normal curve.
B) Find the area between z = -1 and z = 1 under a standard normal curve.
C) Find the area to the right of z =1 under a standard normal curve.
D) Find the area to the right of z = - under a standard normal curve.

Question

Quizplus · Accepted Answer

To find the proportion of men with a pulse rate greater than 78, we first calculate the z-score for 78: $z = \frac{78 - 70}{8} = 1$. The proportion of men with a pulse rate greater than 78 is found by looking at the area to the right of z = 1 under a standard normal curve.

Pulse Rates of Adult Men Are Approximately Normal with a Mean