Question

In a large population, very close to 25% of the observations will fall below the 25th percentile (Q1), and close to 75% fall below the 75th percentile (Q3). The Web site of the Educational Testing Service reports that on the SAT Verbal test, with a possible perfect score of 800, the 87th percentile of 1,475,623 scores nationwide is a score of 640. What is the best estimate of exactly how many scores were below 640?

Answer 1

E. 1,284,000

Explanation:

A.P.E.X.

Answer 2

There would be about 1,283,792 scores below 640.

The 87th percentile means that 87% of the scores are below 640. All we need to do is multiply the total number of scores by 0.87 and we will have the number below 640.