11.5.2 Variance
Chapter 8: Chapter 11 · MATHEMATICS-VOLUME 2 · EN medium
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Variance is a statistical measure that tells us how measured data vary from the average value of the set of data. Mathematically, variance is the mean of the squares of the deviations from the arithmetic mean of a data set. The terms variability, spread, and dispersion are synonyms, and refer to how spread out a distribution is. Definition . : (Variance) The variance of a random variable X denoted by Var or or ) or
📖 Class 12 Mathematics English Volume 2 2025 Edition www.tntextbooks.in · Page 209
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Variance is a statistical measure that tells us how measured data vary from the average value of the set of data. Mathematically, variance is the mean of the squares of the deviations from the arithmetic mean of a data set. The terms variability, spread, and dispersion are synonyms, and refer to how spread out a distribution is. Definition .
: (Variance) The variance of a random variable X denoted by Var or or ) or
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