For a class test, the mean score was 65, the median score was 71 and sthe standard deviation of the scores was 7. The teacher decided to add 5 points to each score due to a grading error. Which of the folloiwng must be true for thenew scores?

Question

For a class test, the mean score was 65, the median score was 71 and sthe standard deviation of the scores was 7.  The teacher decided to add 5 points to each score due to a grading error.  Which of the folloiwng must be true for thenew scores?
TH

bobpursley · Answer

Hmmmm. the mean is now 70, the median is now 76, and the standard deviation is 7. That is not a smart way to curve grades, usually.