org.statcato.statistics.inferential

Class CIMatchedPairs

java.lang.Object

org.statcato.statistics.inferential.ConfidenceInterval

org.statcato.statistics.inferential.CIMatchedPairs

public class CIMatchedPairs
extends ConfidenceInterval

Confidence interval class for matched pairs.

Since:

1.0

Constructor Summary

Constructors

Constructor and Description
CIMatchedPairs(double confidenceLevel, int n, double mu, double s) Constructor.

Method Summary

Modifier and Type	Method and Description
double	criticalValue() Returns the critical value corresponding to the given confidence level.
double	marginOfError() Returns the margin of error.

Methods inherited from class org.statcato.statistics.inferential.ConfidenceInterval

center, lowerLimit, toString, upperLimit

Methods inherited from class java.lang.Object

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

Constructor Detail

CIMatchedPairs

public CIMatchedPairs(double confidenceLevel,
                      int n,
                      double mu,
                      double s)

Constructor.

Parameters:

confidenceLevel - confidence level, between 0 and 1

n - sample size (number of matched pairs)

mu - sample mean of differences

s - sample standard deviation of differences

Method Detail

marginOfError

public double marginOfError()

Returns the margin of error. E = t_(alpha/2) * s / sqrt(n).

Specified by:

marginOfError in class ConfidenceInterval

Returns:

margin of error

criticalValue

public double criticalValue()

Returns the critical value corresponding to the given confidence level. Uses the t distribution to find t_(alpha/2), where alpha is the significance level (1 - confidence level).

Specified by:

criticalValue in class ConfidenceInterval

Returns:

critical value