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?

So confused on this one..

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?


So confused on this one..

anonymous · Answer

you r asking for 86th percentile ?

anonymous · Answer

its asking the number of scores below 640, not sure how to find that though

anonymous · Answer

i dont know how ~_~