Twelve observations satisfy and

MATHEMATICS · Single correct · CBSE · Mathematics · Statistics · Statistics

Problem

Twelve observations satisfy ∑x=78\sum x = 78 and ∑x2=590\sum x^{2} = 590. Calculate the population standard deviation σ\sigma (correct to two decimal places). (a) 6.926.92 (b) 2.752.75 (c) 2.632.63 (d) 7.017.01

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