Asked by Stephanie Forbes

The Graduate Record Exam has combined verbal and quantitative mean of 1000 and a standard deviation of 200. Score range from 200 to 1600 and are approximately normally distributed.

a. What percentage score above 800?
b. Above what score do 20% of the test-takers score?

Answers

Answered by Damon
http://davidmlane.com/hyperstat/z_table.html
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