Question

students’ scores on an anthropology test have a mean of 31 with a standard deviation of 3.5 if rochelle scores 20 on her test, how many standard deviations away from the mean is her score

Answer 1

3.14

Explanation:

The difference between her score and the mean is:

20 − 31 = -11

The number of standard deviations that equals is:

-11 / 3.5 ≈ -3.14

Her score is approximately 3.14 standard deviations below the mean.