A Sample with M = 85 and S = 12

Multiple Choice

A sample with M = 85 and s = 12 is transformed into z-scores.After the transformation,what are the values for the mean and standard deviation for the sample of z-scores?​

A) M = 85 and s = 12​
B) ​M = 0 and s = 12
C) ​M = 85 and s = 1
D) ​M = 0 and s = 1