A researcher computed the mean, the median, and the standard deviation Q for a set of performance scores. If 5 were to be added to each score, which of these three statistics would change?  Choose the correct choice from the following answers:
A) The mean only	B) The median only	C) The standard deviation only	D) The mean and the median	E) The mean and the standard deviation
If we add or subtract a constant to each term in a set the standard deviation Q will not change..   If we add (or subtract) a constant to each term in a set the mean and the median will increase (decrease) by the value of that constant.   Answer: The mean and the median.
<result>D</result>
A researcher computed the mean, the median, and the standard deviation Q for a set of performance scores. If 5 were to be added to each score, which of these three statistics would change?