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TwoSampleZTestPowerAnalysisGetEffectSize Method

Estimates the number of samples necessary to attain the required power level for the given effect size.

Namespace:  Accord.Statistics.Testing.Power
Assembly:  Accord.Statistics (in Accord.Statistics.dll) Version: 3.8.0
Syntax
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public static TwoSampleZTestPowerAnalysis GetEffectSize(
	int sampleSize1,
	int sampleSize2,
	double power = 0.8,
	double alpha = 0.05,
	TwoSampleHypothesis hypothesis = TwoSampleHypothesis.ValuesAreDifferent
)
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Parameters

sampleSize1
Type: SystemInt32
The number of observations in the first sample.
sampleSize2
Type: SystemInt32
The number of observations in the second sample.
power (Optional)
Type: SystemDouble
The desired power level. Default is 0.8.
alpha (Optional)
Type: SystemDouble
The desired significance level. Default is 0.05.
hypothesis (Optional)
Type: Accord.Statistics.TestingTwoSampleHypothesis
The alternative hypothesis (research hypothesis) to be tested.

Return Value

Type: TwoSampleZTestPowerAnalysis
The required number of samples.
See Also