Sample Variance Formula
Formula: s² = (1)/(n - 1) ∑(i = 1)ⁿ (x i - x)² Applicable Conditions: A set of observed data x₁, x₂,..., x n, typically used for sample data. Brief Description…
Syllabus path: Probability and Statistics › Numerical Characteristics of Data (Mean, Variance, etc.)
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CSCA Mathematics Formula Reference
Formula and explanation
Formula: s² = (1)/(n - 1) ∑(i = 1)ⁿ (x i - x)² Applicable Conditions: A set of observed data x₁, x₂,..., x n, typically used for sample data. Brief Description: Sample variance measures the dispersion (spread) of data around its mean. The denominator n - 1 is used to obtain an unbiased estimator of the population variance.
Related tutorial and examples
Numerical Characteristics of Data (Mean, Variance, etc.)
Numerical Characteristics of Data (Mean, Variance, etc.) Core Conceptual Framework Statistics describes a set of data (sample x₁, x₂,..., x n ) primarily through two dimensions of numerical characteristics: 1. Central Tendency: Finding the "center" or "representative value" of th…
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