SOLUTION: Scores on the SAT form a normal distribution with an average of 500 and a standard deviation of 100. What is the SAT score at which 10% of people fall above? I don't think I'm p

SOLUTION: Scores on the SAT form a normal distribution with an average of 500 and a standard deviation of 100. What is the SAT score at which 10% of people fall above? I don't think I'm p

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Question 921274: Scores on the SAT form a normal distribution with an average of 500 and a standard deviation of 100. What is the SAT score at which 10% of people fall above?
I don't think I'm plugging the numbers in right.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
Re TY, Wanting the top 10%
invN0rm(.90) = 1.2816
1.2816(100) + 500 = X = 628

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