Assume the average height for American women is 64 inches with a standard deviation of 2 inches.What percent of groups of size 25 would have mean heights of less than 62 inches? (Round z score to two decimal places.)
A) 50.00
B) 0.40
C) 0.13
D) 0

Question

Quizplus · Accepted Answer

The standard error of the mean for a group of 25 is 2/sqrt(25) = 0.4. The z-score for a mean of 62 inches is (62-64)/0.4 = -5.00. A z-score of -5.00 corresponds to a probability of essentially 0%.

Assume the Average Height for American Women Is 64 Inches