Human body temperatures are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F. If 19 people are randomly selected, find the probability that their mean body temperature will be less than 98.50°F.
A) 0.9826
B) 0.0833
C) 0.3343
D) 0.4826

Question

Quizplus · Accepted Answer

The standard error of the mean is 0.62/√19. Using the z-score formula, the z-score for 98.50°F is calculated and then the cumulative probability is found using the standard normal distribution table.

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