Question

If mean of a set of observations is x bar, then evaluate sigma(xi-x bar).

Answer 1

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Answer 2

The value of sigma($x_{i}-$xbar) = 0

• Let n be the number of observations.
• Let those observations be $x_{1}, x_{2}, x_{3} ............................ x_{n}$
• Mean of any given data is given by
• Mean = (sum of observations)/(number of observations)