HypothesisTest2MeanSigmaKnown







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org.statcato.statistics.inferential

Class HypothesisTest2MeanSigmaKnown

java.lang.Object
org.statcato.statistics.inferential.HypothesisTest2MeanSigmaKnown



public class HypothesisTest2MeanSigmaKnownextends java.lang.Object



A hypothesis test for 2 population means (population standard deviations sigmas known).




Since:
1.0
Version:
%I%, %G%
Author:
Margaret Yau











Constructor Summary


HypothesisTest2MeanSigmaKnown(int n1,
int n2,
double xBar1,
double xBar2,
double sigma1,
double sigma2,
double diff,
double confidenceLevel,
int testType)


          Constructor


 






Method Summary



 java.lang.String
criticalValue()


          Returns the critical value corresponding to the given confidence level and type of test.



 double
pValue()


          Returns the p-value in a z distribution.



 double
testStatistics()


          Returns the test statistics.


 


Methods inherited from class java.lang.Object


clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait


 








Constructor Detail




HypothesisTest2MeanSigmaKnown

public HypothesisTest2MeanSigmaKnown(int n1,
int n2,
double xBar1,
double xBar2,
double sigma1,
double sigma2,
double diff,
double confidenceLevel,
int testType)

Constructor


Parameters:n1 - sample size 1n2 - sample size 2xBar1 - sample mean 1xBar2 - sample mean 2sigma1 - population standard deviation 1sigma2 - population standard deviation 2diff - hypothesized difference in population meanconfidenceLevel - confidence leveltestType - type of test (as defined in HypothesisTest)








Method Detail




testStatistics

public double testStatistics()

Returns the test statistics.



Returns:test statistic t score





criticalValue

public java.lang.String criticalValue()

Returns the critical value corresponding to the given confidence level and type of test. Uses the z distribution.



Returns:critical valueSee Also:HypothesisTest





pValue

public double pValue()

Returns the p-value in a z distribution.



Returns:p-value















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