Question

Find each of the following percentile points and draw the appropriate normal

curve. Complete your procedures.

1.The results of the entrance examination for freshmen are normally distributed with x=87 and s=12.5. What is the percentile rank of a score of 90?

Answer 1

$P(X<90)=P(Z<\frac{90-87}{12.5})=P(Z<0.24)=0.59483$