com.datumbox.framework.core.statistics.sampling

Class ClusterSampling

java.lang.Object

com.datumbox.framework.core.statistics.sampling.ClusterSampling

public class ClusterSampling
extends java.lang.Object

This class provides methods which can be used for performing Cluster Sampling.

Constructor Summary

Constructors

Constructor and Description
ClusterSampling()

Method Summary

Modifier and Type	Method and Description
static double	mean(TransposeDataCollection sampleDataCollection) Calculate the mean from the sample
static double	nBar(TransposeDataList clusterIdList) Returns the mean cluster size.
static TransposeDataCollection	randomSampling(TransposeDataList clusterIdList, int sampleM) Samples m clusters by using Cluster Sampling
static double	xbarStd(TransposeDataCollection sampleDataCollection, int populationM, double Nbar) Calculates Standard Deviation for Xbar
static double	xbarVariance(TransposeDataCollection sampleDataCollection, int populationM, double Nbar) Calculates Variance for Xbar

Methods inherited from class java.lang.Object

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

Constructor Detail

ClusterSampling

public ClusterSampling()

Method Detail

nBar

public static double nBar(TransposeDataList clusterIdList)

Returns the mean cluster size.

Parameters:

clusterIdList -

Returns:

randomSampling

public static TransposeDataCollection randomSampling(TransposeDataList clusterIdList,
                                                     int sampleM)

Samples m clusters by using Cluster Sampling

Parameters:

clusterIdList -

sampleM -

Returns:

mean

public static double mean(TransposeDataCollection sampleDataCollection)

Calculate the mean from the sample

Parameters:

sampleDataCollection -

Returns:

xbarVariance

public static double xbarVariance(TransposeDataCollection sampleDataCollection,
                                  int populationM,
                                  double Nbar)

Calculates Variance for Xbar

Parameters:

sampleDataCollection -

populationM -

Nbar -

Returns:

xbarStd

public static double xbarStd(TransposeDataCollection sampleDataCollection,
                             int populationM,
                             double Nbar)

Calculates Standard Deviation for Xbar

Parameters:

sampleDataCollection -

populationM -

Nbar -

Returns: