Method SampleVariance

pkg/stats/statvar.go:92–97

SampleVariance returns the sample variance with Bessel's correction (divides by N−1), giving an unbiased estimator when the observations are a random sample from a larger population. Returns 0 when fewer than two observations are present.

()

// sample from a larger population.  Returns 0 when fewer than two observations
// are present.
func (s *StatVar) SampleVariance() float64 {
	if s.count < 2 {
		return 0
	}
	return s.m2 / float64(s.count-1)
}

// SampleStdDev returns the sample standard deviation with Bessel's correction
// (sqrt of SampleVariance).