A researcher computed the mean, the median, and the standard deviation R 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
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 R 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 R for a set of performance scores. If 5 were to be added to each score, which of these three statistics would change?