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If 5 points were added to each score, which of the following would N
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28 Jul 2021, 18:42
If 5 points were added to each score, which of the following would NOT be affected?
Solution:
(A) The highest score----> If we add 5 to the old highest score the resulting score will also increase by 5. Thus there will be a change in the score- OUT
(B) The mean for all scores----> ----> As only the total score increase by 5 and the total number of students remain the same the mean will also have a proportionate increase- OUT
(C) The median for the seniors’ scores----> - We do not know the median for the senior's score. But if we add 5 the scores will surely rise- OUT
(D) The mode for the juniors’ scores----> - Similar to option C -OUT
(E) The standard deviation for all scores----> - An important thing to note about SD is if any value is add or subtracted to every score the standard deviation remains the same- Thus this is the correct answer
IMO E
Hope this helps!