First of all, I would like to thank all of the GMAT Club team for the amazing effort and dedication it continues to show.
I personally get motivated when I read about the successful GMAT journeys and their after math.
I have a question regarding one of the Standard Deviation examples mentioned in Flash Cards (Slide #33)
What is the Standard Deviation of a set of consecutive even integers?
(1) There are 39 elements in the set.
(2) the mean of the set is 382
The answer is A, statement (1) is sufficient.
Can some one please explain the logic behind it. I mean how can we get the S.D with out having the actual elements?
Thanks in advance