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Ex 15.2, 3 - Find mean, variance for first 10 multiples of 3 - Standard deviation and variance - Ungrouped data

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  1. Chapter 15 Class 11 Statistics
  2. Serial order wise
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Ex 15.2, 3 Find the mean and variance for the first 10 multiples of 3 First 10 multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 ∴ ∑▒〖(xi−𝑥 ̅ )2=74.25〗 Variance (σ)2 = (∑▒(xi − 𝑥 ̅ )2 " " )/𝑛 = 742.5/10=𝟕𝟒.𝟐𝟓

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