Question #324558

The results of a nationwide aptitude test in mathematics are normally distributed with mean of 80 and standard deviation of 50.What is the percentile rank of a score of 84

1

Expert's answer

2022-04-06T16:26:12-0400

P(X<84)=P(Z<84−8050)=P(Z<0.08)=0.5319.P(X<84)=P(Z<\frac{84-80}{50})=P(Z<0.08)=0.5319.

Percentile rank of score 84 is 53.


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