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Sample Variance - Definition, Meaning, Formula, Examples

What is the Sample Variance in Statistics? In statistics, sample variance is calculated on the basis of sample data and is used to determine the deviation of data points from the mean. What is the Formula for Sample Variance? The formulas for sample variance are given as follows:Ungrouped Data: s2 = ∑ni=1(xi−μ)2n−1∑i=1n(xi−μ)2n−1 Grouped data: s2 = ∑ni=1f(mi−¯¯¯x)2N−1∑i=1nf(mi−x¯)2N−1

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