1. Chapter 15 Class 11 Statistics
  2. Serial order wise
  3. Examples

Example 9

Last updated at Dec. 12, 2016 by

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

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  1. Chapter 15 Class 11 Statistics
  2. Serial order wise
    3. Examples
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Example 9 Find the variance and standard deviation for the following data: First we will calculate mean Now, finding variance ﷮﷮ 𝑓﷮𝑖﷯ 𝑥𝑖− 𝑥﷯﷯2﷯= 1374 ﷮﷮𝑓𝑖﷯=30 Variance (σ2) = ﷮﷮ 𝑓﷮𝑖﷯ 𝑥𝑖 − 𝑥﷯﷯2﷯﷮ ﷮﷮𝑓𝑖﷯﷯ = 1374﷮30﷯ = 45.8 Standard deviation (σ) = ﷮45.8﷯ = 6.76

Chapter 15 Class 11 Statistics
Serial order wise

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