com.github.chen0040.si.testing

Class Anova

java.lang.Object

com.github.chen0040.si.testing.Anova

public class Anova
extends Object

Created by xschen on 3/5/2017. Anova (Analysis of Variance) Conducted between one numerical variable and one categorical variable it is used to find whether there is a correlation between a numerical variable and a categorical variable for which the categorical variable has more than two levels Suppose the sample mean of the numerical variables grouped by the categorical variables are: x_bar_1, x_bar_2, ..., x_bar_i where j \in (1, 2, i, ...) are the levels in the categorical variable Then the null hypothesis can be formulated as: H_0: The mean outcome is the same across all categories, namely mu_1 = mu_2 = ... = mu_i = ... In other words, the numerical variable is independent of the categorical variable The alternative hypothesis can be formulated as: H_A: There exists (j, k) where j, k are two levels in the categorical variable, such that mu_j != mu_k The numerical variable is called response variable while the categorical variable is called explanatory variable

Constructor Summary

Constructors

Constructor and Description
Anova()
Anova(Sample sample)

Method Summary

Modifier and Type	Method and Description
String	getSummary()
void	report()
Anova	run(SampleDistribution sampleDistributionTotal, Map<String,SampleDistribution> sampleDistributionByGroupId)
Anova	run(SampleDistribution sampleDistributionTotal, Map<String,SampleDistribution> sampleDistributionByGroupId, double significanceLevel)
String	toString()
boolean	willRejectH0(double significanceLevel)

Methods inherited from class java.lang.Object

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

Constructor Detail

Anova

public Anova(Sample sample)

Anova

public Anova()

Method Detail

run

public Anova run(SampleDistribution sampleDistributionTotal,
                 Map<String,SampleDistribution> sampleDistributionByGroupId)

run

public Anova run(SampleDistribution sampleDistributionTotal,
                 Map<String,SampleDistribution> sampleDistributionByGroupId,
                 double significanceLevel)

getSummary

public String getSummary()

toString

public String toString()

Overrides:

toString in class Object

report

public void report()

willRejectH0

public boolean willRejectH0(double significanceLevel)