For a data set of 8 observations the arithmetic mean is 5 and the variance is 9

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

Problem

For a data set of 8 observations the arithmetic mean is 5 and the variance is 9. What is the value of ∑xi2\sum x_{i}^{2}? (a) 238238 (b) 247247 (c) 272272 (d) 263263

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