Ex 15.2, 7 - Find mean and variance for frequency distribution - Standard deviation and variance - Continuous frequency (grouped data)

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  1. Chapter 15 Class 11 Statistics
  2. Serial order wise
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Ex15.2, 7 Find the mean and variance for the following frequency distribution. ( )^2 = 68280 N = = 30 Variance (" " ^2) = 1/ ( )^2 = 1/30 68280 = 2276

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