org.statcato.statistics.inferential

Class HypothesisTest2Var

java.lang.Object

org.statcato.statistics.inferential.HypothesisTest2Var

public class HypothesisTest2Var
extends java.lang.Object

A hypothesis test for 2 population variances.

Since:

1.0

Constructor Summary

Constructors

Constructor and Description
HypothesisTest2Var(int n1, int n2, double var1, double var2, double confidenceLevel, int testType) Constructor

Method Summary

Modifier and Type	Method and Description
java.lang.String	criticalValue() Returns the critical value corresponding to the given confidence level and type of test.
int	DOF1() Returns the degree of freedom 1.
int	DOF2() Returns the degree of freedom 2.
double	pValue() Returns the p-value in a F distribution.
double	testStatistics() Returns the test statistics F = var1 / var2.

Methods inherited from class java.lang.Object

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

Constructor Detail

HypothesisTest2Var

public HypothesisTest2Var(int n1,
                          int n2,
                          double var1,
                          double var2,
                          double confidenceLevel,
                          int testType)

Constructor

Parameters:

n1 - sample size 1

n2 - sample size 2

var1 - sample variance 1

var2 - sample variance 2

confidenceLevel - confidence level

testType - type of test (as defined in HypothesisTest)

Method Detail

testStatistics

public double testStatistics()

Returns the test statistics F = var1 / var2.

Returns:

test statistic F

DOF1

public int DOF1()

Returns the degree of freedom 1.

Returns:

degree of freedom 1

DOF2

public int DOF2()

Returns the degree of freedom 2.

Returns:

degree of freedom 2

criticalValue

public java.lang.String criticalValue()

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

Returns:

critical value

See Also:

HypothesisTest

pValue

public double pValue()

Returns the p-value in a F distribution.

Returns:

p-value