Package de.uka.ipd.sdq.statistics.estimation

Class ConfidenceInterval

java.lang.Object

de.uka.ipd.sdq.statistics.estimation.ConfidenceInterval

public class ConfidenceInterval
extends Object

Represents a confidence interval. Whether one confidence interval contains another can be checked by using the contains(ConfidenceInterval) method.

Constructor Summary

Constructors

Constructor	Description
ConfidenceInterval(double mean, double halfWidth, double level)	Constructs a confidence interval around the specified mean having width (2 * mean * halfWidth).
ConfidenceInterval(double mean, double lowerBound, double upperBound, double level)	Constructs a confidence interval around the specified mean, having bounds lowerBound and upperBound.

Method Summary

Modifier and Type	Method	Description
boolean	contains(ConfidenceInterval ci)	Checks, whether the specified confidence interval lies within the bounds of this confidence interval.
double	getLevel()
double	getLowerBound()
double	getMean()
double	getUpperBound()
void	setLowerBound(double lowerBound)
void	setMean(double mean)
void	setUpperBound(double upperBound)

Methods inherited from class java.lang.Object

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

Constructor Detail

ConfidenceInterval

public ConfidenceInterval(double mean,
                          double lowerBound,
                          double upperBound,
                          double level)

Constructs a confidence interval around the specified mean, having bounds lowerBound and upperBound.

Parameters:

mean - the center of the confidence interval

lowerBound - the confidence interval's lower bound

upperBound - the confidence interval's upper bound

level - the confidence level. Use values between 0 and 1. For instance use 0.95 to estimate the 95% confidence interval.

noOfObservations - the number of observations this confidence interval is constructed from

ConfidenceInterval

public ConfidenceInterval(double mean,
                          double halfWidth,
                          double level)

Constructs a confidence interval around the specified mean having width (2 * mean * halfWidth).

Parameters:

mean - the center of the confidence interval

halfWidth - the relative half-width. Use values between 0 and 1. For instance use 0.1 in order to specify a 10% half-width.

Method Detail

getLowerBound

public double getLowerBound()

setLowerBound

public void setLowerBound(double lowerBound)

getUpperBound

public double getUpperBound()

setUpperBound

public void setUpperBound(double upperBound)

getMean

public double getMean()

setMean

public void setMean(double mean)

getLevel

public double getLevel()

contains

public boolean contains(ConfidenceInterval ci)

Checks, whether the specified confidence interval lies within the bounds of this confidence interval.

Parameters:

ci - the confidence interval

Returns:

true if this confidence interval contains the specified one; false else.