Question

A college student takes a standardized test and scores a 163. if the mean is 155 and the standard deviation is 7, what is the student’s percentile rank? (assume a normal distribution.)

Answer 1

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. Multiply by 100.

Percentile rank is % ≤ any score.