Answer to Question #316394 in Statistics and Probability for Tina

Statistics and Probability

Question #316394

The results of a Nationwide aptitude test in mathematics are normally distributed with m=80 and s=15 what percentile rank of a score of 90

Expert's answer

"P(X<90)=P(Z<\\frac{90-80}{15})=P(Z<0.67)=0.7486."

Percentile rank: 74.

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