A researcher computed the mean, the median and the standard deviation for a set of performance scores. If 5 were to be added to each score, which of these three statistics would change?
সমাধান
সঠিক উত্তর: Option D
If we add or subtract a constant to each term in a set the standard deviation 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.
