SOLUTION: Given the sample 7, 6, 10, 7, 5, 9, 3, 7, 5, 13, what is the value of Σ(x - xbar)?

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Question 1139958: Given the sample 7, 6, 10, 7, 5, 9, 3, 7, 5, 13, what is the value of Σ(x - xbar)?
Found 2 solutions by Edwin McCravy, ikleyn:
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
1. Add them up.
2. Divide by 10, the number of numbers.  That's x-bar.
3. Subtract x-bar from every one of them, some will be negative
   and some positive.
4. Add them up.

Edwin
Answer by ikleyn(52803)   (Show Source): You can put this solution on YOUR website!
.

ANSWER.  This sum is  0  (zero, ZERO).



HINT :  The sum  Σ(x  -  xbar)  is equal to zero for ANY sample sequence.


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