Example 11 - Find standard deviation - Chapter 15 Class 11 - Standard deviation and variance - Discrete frequency (grouped data)

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  1. Chapter 15 Class 11 Statistics
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Example 11 Find the standard deviation for the following data: Std. Deviation(σ) = 1﷮N﷯ ﷮N ﷮﷮fixi2 −( ﷮﷮fixi)2﷯﷯ ﷯ = 1﷮48﷯ ﷮48×9652 − 614﷯2﷯ = 1﷮48﷯ ﷮463296−376996﷯ = 1﷮48﷯ ﷮86300﷯ = 1﷮48﷯ x 293.77 = 6.12 Therefore, standard deviation (σ ) = 6.12

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