org.statcato.statistics.inferential

Class CI2PopVar

java.lang.Object

org.statcato.statistics.inferential.CI2PopVar

public class CI2PopVar
extends java.lang.Object

Confidence interval class for two population mean, sigma (population standard deviation) known.

Since:

1.0

Constructor Summary

Constructors

Constructor and Description
CI2PopVar(double confidenceLevel, int n1, int n2, double var1, double var2) Constructor.

Method Summary

Modifier and Type	Method and Description
java.lang.String	CIStdev() Returns a string representation of the confidence interval for standard deviation.
java.lang.String	CIVar() Returns a string representation of the confidence interval for variance.
double	criticalValueLeft() Returns the left-tail critical value (F_L).
double	criticalValueRight() Returns the right-tail critical value (F_R).
double	lowerLimit() Returns the lower limit of the confidence interval.
double	upperLimit() Returns the upper limit of the confidence interval.

Methods inherited from class java.lang.Object

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

Constructor Detail

CI2PopVar

public CI2PopVar(double confidenceLevel,
                 int n1,
                 int n2,
                 double var1,
                 double var2)

Constructor.

Parameters:

confidenceLevel - confidence level, between 0 and 1

n1 - sample size 1

n2 - sample size 2

var1 - sample variance 1

var2 - sample variance 2

Method Detail

criticalValueRight

public double criticalValueRight()

Returns the right-tail critical value (F_R).

Returns:

F_R

criticalValueLeft

public double criticalValueLeft()

Returns the left-tail critical value (F_L).

Returns:

F_L

lowerLimit

public double lowerLimit()

Returns the lower limit of the confidence interval.

Returns:

lower limit

upperLimit

public double upperLimit()

Returns the upper limit of the confidence interval.

Returns:

upper limit

CIVar

public java.lang.String CIVar()

Returns a string representation of the confidence interval for variance.

Returns:

string

CIStdev

public java.lang.String CIStdev()

Returns a string representation of the confidence interval for standard deviation.

Returns:

string