TwoSampleTTest.CohenD Property

public double CohenD { get; }

Public ReadOnly Property CohenD As Double
	Get

public:
property double CohenD {
	double get ();
}

member CohenD : float with get

Property Value

Cohen's d is a standardized difference between two means. It is calculated as the difference between the means of two groups divided by the pooled standard deviation. Adjustments are made based on whether the test is paired of unpaired, and whether or not the variances of the sample are assumed to be equal.

This value is commonly used to measure the magnitude of an effect in hypothesis testing.

When the number of observations is small, HedgesG may be more accurate.

Reference