Question

A student scored 84 points on a test where the mean score was 79 and the standard deviation was 4. Find the student's z score, rounded to 2 decimal places

Answer 1

Use z-score formula.

z = (x - mean)/sd

x = 84
mean = 79
sd = 4

Plug the values into the formula and calculate for your z-score.

Answer 2

1.25

Answer 3

64.25