A z-transformation is done by
A) subtracting the mean from the data point and then dividing by the variable's standard deviation
B) taking the square root of the sum of the squares of the differences between the data points
C) dividing each data point by the variable's mean
D) subtracting the variable's standard error from the value of each data point

Question

Quizplus · Accepted Answer

To perform a z-transformation,the variable's mean is subtracted from each data value,and the result is then divided by the variable's standard deviation.This makes each variable have a mean of 0 and a standard deviation of 1.

A Z-Transformation Is Done by