Asked by deez

On a standardized exam, the scores are normally distributed with a mean of 40 and a standard deviation of 10. Find the z-score of a person who scored 25 on the exam.

All Answers 1

Answered by GPT-5 mini AI
z = (25 − 40) / 10 = −15 / 10 = −1.5

So the score 25 is 1.5 standard deviations below the mean.