A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 8.In this sample,what is the z-score corresponding to X = 57?
A)z = 12/20 = 0.60
B)z = 1.00
C)z = 1.50
D)z = 2.00

Question

A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 8.In this sample,what is the z-score corresponding to X = 57?​
A)​z = 12/20 = 0.60
B)​z = 1.00
C)​z = 1.50
D)​z = 2.00

Quizplus · Accepted Answer

To calculate the z-score, we use the formula z = (X - M) / s. Plugging in the values, we get z = (57 - 45) / 8 = 1.5. Therefore, the z-score corresponding to X = 57 is 1.50.

A Sample of N = 20 Scores Has a Mean