GRE Question of the Day (July 18th)

Math

A survey measures the heights of 900 people, which are found to be normally distributed. The mean height is 5′ 5″, and 150 people in the survey have a height between 5′ 1″ and 5′ 3″.

Quantity A	Quantity B
The number of people in the survey who are taller than 5′ 9″	The number of people in the survey who are more than 2 standard deviations above the mean

A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given

Correct Answer - A - (click and drag your mouse to see the answer)

Question Discussion & Explanation