Question

The mean grade on a biology test is 76 , with a standard deviation of 4. If student A scored an 83 , what is the z-score? Round your answer to the nearest hundredth

Answer 1

1.75.

Explanation:

Z-score = (x - m) / s

where m = mean and s =std dev.

So it is (83-76/ / 4

= 7/4

= 1.75.