Click or drag to resize
Accord.NET (logo)

ZTestPowerAnalysisGetSampleSize 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
public static ZTestPowerAnalysis GetSampleSize(
	double delta,
	double standardDeviation = 1,
	double power = 0.8,
	double alpha = 0.05,
	OneSampleHypothesis hypothesis = OneSampleHypothesis.ValueIsDifferentFromHypothesis
Request Example View Source


Type: SystemDouble
The minimum detectable difference.
standardDeviation (Optional)
Type: SystemDouble
The difference standard deviation.
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.TestingOneSampleHypothesis
The alternative hypothesis (research hypothesis) to be tested.

Return Value

Type: ZTestPowerAnalysis
The required number of samples.
See Also