edu.northwestern.at.utils.math.distributions
Class Sig

java.lang.Object
  edu.northwestern.at.utils.math.distributions.Sig

public class Sig
extends java.lang.Object

Point probabilities and percentage points for statistical distributions.

This class provides "one stop shopping" for point probabilities percentage points for commonly used statistical distributions. These include the Beta, F, t, chi-square, and normal distributions. Both the forward (probability) and inverse (percentage point) functions are provided. This class is actually just provides a shim to the methods in the individual classes for each distribution.

Point probability routines

• chisquare -- significance of chi-square
• f -- significance of F
• normal -- significance of normal value
• t -- significance of Student's t

Inverse distributions (percentage points)

• chisquareInverse -- inverse chi-square
• fInverse -- inverse F
• normalInverse -- inverse normal
• tInverse -- inverse t

Constructor Summary

protected

Sig() Make class non-instantiable but inheritable.

Method Summary

static double	bonferroni(double p, int n)
static double	chisquare(double chiSquare, double df)
static double	chisquare(double chiSquare, int df)
static double	chisquareInverse(double p, double df)
static double	chisquareInverse(double p, int df)
static double	f(double f, double dfn, double dfd)
static double	f(double f, int dfn, int dfd)
static double	fInverse(double p, double dfn, double dfd)
static double	fInverse(double p, int dfn, int dfd)
static double	normal(double z)
static double	normalInverse(double p)
static double	sidak(double p, int n)
static double	t(double t, double df)
static double	t(double t, int df)
static double	tInverse(double p, double df)
static double	tInverse(double p, int df)

Methods inherited from class java.lang.Object

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

Constructor Detail

Sig

protected Sig()

Make class non-instantiable but inheritable.

Method Detail

chisquare

public static double chisquare(double chiSquare,
                               double df)

chisquare

public static double chisquare(double chiSquare,
                               int df)

chisquareInverse

public static double chisquareInverse(double p,
                                      double df)

chisquareInverse

public static double chisquareInverse(double p,
                                      int df)

f

public static double f(double f,
                       double dfn,
                       double dfd)

f

public static double f(double f,
                       int dfn,
                       int dfd)

fInverse

public static double fInverse(double p,
                              double dfn,
                              double dfd)

fInverse

public static double fInverse(double p,
                              int dfn,
                              int dfd)

normal

public static double normal(double z)

normalInverse

public static double normalInverse(double p)

t

public static double t(double t,
                       double df)

t

public static double t(double t,
                       int df)

tInverse

public static double tInverse(double p,
                              double df)

tInverse

public static double tInverse(double p,
                              int df)

sidak

public static double sidak(double p,
                           int n)

bonferroni

public static double bonferroni(double p,
                                int n)