Question

Find the z-score for the value 79, when the mean is 81 and the standard deviation is 6.

A. z = -0.33
B. z = -0.90
C. z = 0.90
D. z = -0.50

Answer 1

The z-score for the value 79, when the mean is 81 and the standard deviation is 6, is -0.33.

Step-by-step explanation:

The z-score for the value 79, when the mean is 81 and the standard deviation is 6, can be calculated using the formula:

z = (x - mean) / standard deviation

Substituting the given values, we have:

z = (79 - 81) / 6 = -0.33

Therefore, the correct answer is A. z = -0.33.