Ladies and Gentlemen!
First time posting in this forum, please forgive me if I am in the wrong forum or this question has been posted before.
I was reviewing the diagnostic test I took from the GMAT Club when I found this question:
consists of N
elements. If N \gt 2
, what is the standard deviation of S
1. The mean and median of the set are equal
2. The difference between any two elements of the set is equal
Note: I talk about the answer below, so if you want to solve yourself, do not look underneath
I understand why Statement 1 is insufficient. But if all you kind folks can explain why Statement 2 is sufficient, I would be eternally grateful. Thank you very much.
"Only by going too far, can one find out how far one can go."