After every score in a sample is multiplied by 3, the mean is calculated and found to be M = 21.What was the mean for the original scores?
A)7
B)21
C)63
D)cannot be determined from the information given

Question

Quizplus · Accepted Answer

When every score in a sample is multiplied by 3, the mean of the original scores is also multiplied by 3. Therefore, the original mean is 21 divided by 3, which is 7.

After Every Score in a Sample Is Multiplied by 3