Which of the following summaries are changed by adding a constant to each data value?
I. the mean
II. the median
III. the standard deviation
A) I, II, and III
B) I and II
C) I only
D) I and III
E) III only

Question

Quizplus · Accepted Answer

Adding a constant to each data value affects the mean and the median by increasing them by that constant, but it does not affect the standard deviation, as standard deviation measures the spread of data, not its location.

Which of the Following Summaries Are Changed by Adding a Constant