Human body temperatures are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F. Find the temperature that separates the top 7% from the bottom 93%. Round to the nearest hundredth of a degree.
A) 97.28°F
B) 99.12°F
C) 98.40°F
D) 98.78°F

Question

Quizplus · Accepted Answer

The z-score for the top 7% is 1.41 (from a z-table). So, the temperature that separates the top 7% from the bottom 93% is 98.20 + 1.41 * 0.62 = 99.12°F.

Human Body Temperatures Are Normally Distributed with a Mean of 98.20°F