A library adds 7 days to the loan period of every book on its shelves. Which of these measures of the loan periods stays the same?

MeanCorrect answerYour answerMedianCorrect answerYour answerModeCorrect answerYour answerRangeCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

Adding 7 to every value adds 7 to the mean, the median and the mode.
The largest and smallest both rise by 7, so their difference, the range, is unchanged.

Worth noting

A shift moves every average but does not change how spread out the data are.

Ten questions from Mean, Median and Mode, at your own pace.

Ten questions from Mean, Median and Mode, at your own pace.

Explanation