Question

Suppose a normal distribution has a mean of 16 and a standard deviation of 4.

A value of 26 is how many standard deviations away from the mean?




−2.5

−1.5

1.5

2.5

Answer 1

Correct Answer is 2.5

Explanation:

Answer 2

To calculate the number of standard deviations away from the mean, we first subtract the actual score from the mean, then divide the difference by the standard deviation. In this case, our actual score is 26, so we subtract from the mean of 16, then divide by the SD of 4
(26 - 16) / 4 = 2.5