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

Example 11 - Chapter 15 Class 11 Statistics - Part 2


Transcript

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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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.