org.statcato.statistics.inferential

Class HypothesisTest2Prop

java.lang.Object

org.statcato.statistics.inferential.HypothesisTest2Prop

public class HypothesisTest2Prop
extends java.lang.Object

A hypothesis test for 2 population proportions.

Constructor Summary

Constructors

Constructor and Description
HypothesisTest2Prop(int n1, int n2, int x1, int x2, double diff, double confidenceLevel, int testType, boolean pool) 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.
double	pValue() Returns the p-value.
double	testStatistics() Returns the test statistics.

Methods inherited from class java.lang.Object

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

Constructor Detail

HypothesisTest2Prop

public HypothesisTest2Prop(int n1,
                           int n2,
                           int x1,
                           int x2,
                           double diff,
                           double confidenceLevel,
                           int testType,
                           boolean pool)

Constructor

Parameters:

n1 - number of trials in population 1

n2 - number of trials in population 2

x1 - number of events in population 1

x2 - number of events in population 2

diff - hypothesized difference

confidenceLevel - confidence level

testType - test type (as defined in HypothesisTest)

Method Detail

testStatistics

public double testStatistics()

Returns the test statistics.

Returns:

test statistic z 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 value

See Also:

HypothesisTest

pValue

public double pValue()

Returns the p-value.

Returns:

p-value