double function ( ) { checkState ( count > 1 ) ; if ( isNaN ( sumOfSquaresOfDeltas ) ) { return NaN ; } return ensureNonNegative ( sumOfSquaresOfDeltas ) / ( count - 1 ) ; }
returns the unbiased sample variance of the values . if this dataset is a sample drawn from a population , this is an unbiased estimator of the population variance of the population . the count must be greater than one . this is not guaranteed to return zero when the dataset consists of the same value multiple times , due to numerical errors . however , it is guaranteed never to return a negative result . non-finite values if the dataset contains any non-finite values double #positive_infinity , double #negative_infinity , or double #nan then the result is double #nan . concode_field_sep long count concode_elem_sep double max concode_elem_sep double mean concode_elem_sep double sumOfSquaresOfDeltas concode_elem_sep double min concode_field_sep void add concode_elem_sep double sumOfSquaresOfDeltas concode_elem_sep double max concode_elem_sep long count concode_elem_sep double sum concode_elem_sep double populationVariance concode_elem_sep double sampleStandardDeviation concode_elem_sep double min concode_elem_sep double calculateNewMeanNonFinite concode_elem_sep void addAll concode_elem_sep void addAll concode_elem_sep void addAll concode_elem_sep void addAll concode_elem_sep void addAll concode_elem_sep void addAll concode_elem_sep double mean concode_elem_sep double populationStandardDeviation concode_elem_sep Stats snapshot