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Ex 15.2, 8 - Find mean, variance - Chapter 15 Class 11 Statistics - Standard deviation and variance - Continuous frequency (grouped data)

Ex 15.2,  8 - Chapter 15 Class 11 Statistics - Part 2

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Ex 15.2, 8 Find the mean and variance for the following frequency distribution. ( )^2 = 6600 N = = 50 Variance (" " ^2) = 1/ ( )^2 = 1/50 6600 = 132

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