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?
            
        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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