SOLUTION: The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200. If John Smith score was 1090 what percentage of the students have a higher

SOLUTION: The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200. If John Smith score was 1090 what percentage of the students have a higher

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Question 1104708: The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200. If John Smith score was 1090 what percentage of the students have a higher score than John?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
need a z-score, z=(x-mean)/sd or (1090-950)/200=140/200 so a z-score greater than +0.7
24.2% had a score higher.
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