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Example 9 - Find variance and standard deviation - Class 11 - Standard deviation and variance - Discrete frequency (grouped data)

Example 9 - Chapter 15 Class 11 Statistics - Part 2

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Example 9 Find the variance and standard deviation for the following data: First we will calculate mean Now, finding variance 2 = 1374 =30 Variance ( 2) = 2 = 1374 30 = 45.8 Standard deviation ( ) = 45.8 = 6.76

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