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

$P(X>90)=1-P(Z<\frac{90-87}{12.5})=1-P(Z<0.24)=1-0.5948=0.4052$