I need help proving that the sum of deviations of a set of measurements about their mean is 0.

http://upload.wikimedia.org/math/6/0...a3cc6a1131.png

Thanks in advance.

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- September 5th 2010, 04:56 PMIceflash234Simple proof
I need help proving that the sum of deviations of a set of measurements about their mean is 0.

http://upload.wikimedia.org/math/6/0...a3cc6a1131.png

Thanks in advance. - September 5th 2010, 05:49 PMpickslides
Maybe use the fact that that

- September 5th 2010, 07:30 PMSoroban
Hello, Iceflash234!

Quote:

I need help proving that the sum of deviations

of a set of measurements about their mean is 0.

. .

Therefore: .