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Why is the average of the deviations of a set of measurement values always zero?

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- Thread starter chynawok
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- #1

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Why is the average of the deviations of a set of measurement values always zero?

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Hurkyl

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Deviations from what?

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Galileo

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[itex]\langle X-\langle X\rangle \rangle =0[/itex]

for any distribution X. It's in the nature of the average. Use the linearity of expectations to show it.

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