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# If the sum of the squares of deviations for 10 observations taken from their mean is 2.5, then write the value of standard deviation.

Answer :

**Given,** The sum of the squares of derivations for 10 observation, and mean is 2.5.

**To Find:** Find the standard derivation

**Explanation:** Here, N=10 and mean = 2.5

The square of each division =

Standard deviation

**Hence, standard deviation is 0.5**

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