Homework Help: Statistics

Posted by Sharon on Wednesday, July 27, 2011 at 2:40am.

If mean of 1, 2, 3, --------- n is 6n/11, then n is

Statistics - Dr Russ, Wednesday, July 27, 2011 at 6:41am
The sum of a series of integers (1,2,3.. n)is

n(n+1)/2

so the mean is the total/n, hence

n(n+1)/2n
=6n/11

solve for n

I got n=11
Statistics - Anonymous, Wednesday, July 27, 2011 at 11:07am
Thank you

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