Which of the following is/are true?
I. Multiplying every value in a distribution by 2 will double the sample variance.
II. Multiplying every value in a distribution by 2 will double the sample mean.
III. Adding a constant to every value in a distribution increase the sample variance by the square of the constant.
Click on the arrows to vote for the correct answer
A. B. C. D. E.Explanation
Multiplying every value in a distribution by 2 will double the sample mean and standard deviation and quadruples the variance. Adding a constant to every value in a distribution leaves the sample variance unchanged.