MathLiveVariance
Gives the average squared distance of values from their mean, measuring how spread out a data set or distribution is. For a sample, the denominator N-1 is used instead of N to get an unbiased estimate.
\sigma^2 = \frac{1}{N}\sum_{i=1}^{N}(x_i-\mu)^2What the symbols mean
| population variance | |
| number of values in the population | |
| the i-th value | |
| population mean of the values |
About this formula
- FieldStatistics
- TopicDescriptive statistics
- LevelHigh school
- Also calledpopulation variance, variance formula, variance of a dataset, spread of data squared deviations, statistical variance, mean squared deviation
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