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Chapter
Variance in Data
DOI link for Variance in Data
Variance in Data book
Variance in Data
DOI link for Variance in Data
Variance in Data book
ABSTRACT
Variance (denoted by σ ^{2}, s ^{2}, or var.) is a squared deviation of a random variable from its mean. It measures the spreading of random numbers from their mean. It tests the concepts of physics, biology, and chemistry. Variance is a square of standard deviation, the second central moment of a distribution, and covariance of a random variable with itself, depicted as under: σ = ( x - μ ) 2 n or σ 2 = ( x - μ ) 2 n $$ \sigma = \sqrt {\frac{{(x - \mu )^{2} }}{n}} \,\,{\text{or}}\,\,\sigma ^{2} = \frac{{(x - \mu )^{2} }}{n} $$ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429027611/ee27d902-51c0-45b6-9364-f33d2ce21265/content/math53_1.tif"/>