If you want to calculate a z score for a test where your raw score was 24,what other information must you know?
A)shape of the distribution
B)mean,median,and mode
C)mean and standard deviation
D)standard deviation only

Question

Quizplus · Accepted Answer

To calculate a z score, you need to know the mean and standard deviation of the distribution. Therefore, the correct option is C. Knowing the shape of the distribution is useful to provide additional information about the data, but it is not required to calculate a z score. The median and mode are not used in z-score calculations. Only the standard deviation is not enough to calculate the z-score without knowing the mean.

If You Want to Calculate a Z Score for a Test