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RazorBack::Statprob_ Class Reference

#include <Statprob.hh>

List of all members.

Static Public Methods

double stdnorm_tail (double z)
 Returns the tail of the standard normal distribution at z.

double t_test (unsigned int df, double t)
 Returns the significance level for the t test. More...

double F_test (unsigned int df1, unsigned int df2, double F)
 Returns the significance level for the test that the F ratio is larger than 1.0. More...

double chi2_test (unsigned int df, double Chi2)
 Returns the significance level for the test that the Chi2 is exceeded for a correct model. More...

double studrange_prob (double q, unsigned int df, unsigned int kno)
 Returns the Q probability value for the Studentized Range. More...

double ibeta_regul (double a, double b, double x)
 The regularized incomplete beta function.

double igamma_regul (double a, double x)
 The regularized incomplete gamma function (1/Gamma(a))*INTEGRAL[exp(-t)*t^(a-1) dt, 0, x].


Static Protected Methods

double gamma_series (double a, double x)
double gamma_contfrac (double a, double x)
double beta_contfrac (double a, double b, double x)

Static Private Attributes

const unsigned int MAXITER
const double EPSILON


Member Function Documentation

double RazorBack::Statprob_::stdnorm_tail ( double z ) [static]
 

Returns the tail of the standard normal distribution at z.

double RazorBack::Statprob_::t_test ( unsigned int df,
double t ) [static]
 

Returns the significance level for the t test.

If the value returned by t_test() is low, then the probability is large that t is high.

double RazorBack::Statprob_::F_test ( unsigned int df1,
unsigned int df2,
double F ) [static]
 

Returns the significance level for the test that the F ratio is larger than 1.0.

If the value returned by F_test() is low, then the probability is large that F is high.

double RazorBack::Statprob_::chi2_test ( unsigned int df,
double Chi2 ) [static]
 

Returns the significance level for the test that the Chi2 is exceeded for a correct model.

The less the probability, the better. :-)

double RazorBack::Statprob_::studrange_prob ( double q,
unsigned int df,
unsigned int kno ) [static]
 

Returns the Q probability value for the Studentized Range.

df is the degrees of freedom, kno is the number of groups.

double RazorBack::Statprob_::ibeta_regul ( double a,
double b,
double x ) [static]
 

The regularized incomplete beta function.

double RazorBack::Statprob_::igamma_regul ( double a,
double x ) [static]
 

The regularized incomplete gamma function (1/Gamma(a))*INTEGRAL[exp(-t)*t^(a-1) dt, 0, x].

double RazorBack::Statprob_::gamma_series ( double a,
double x ) [static, protected]
 

double RazorBack::Statprob_::gamma_contfrac ( double a,
double x ) [static, protected]
 

double RazorBack::Statprob_::beta_contfrac ( double a,
double b,
double x ) [static, protected]
 


Member Data Documentation

const unsigned int RazorBack::Statprob_::MAXITER [static, private]
 

Definition at line 40 of file Statprob.hh.

const double RazorBack::Statprob_::EPSILON [static, private]
 

Definition at line 41 of file Statprob.hh.


The documentation for this class was generated from the following file:
Generated at Wed Aug 21 09:33:19 2002 for The Razorback C++ Library: Statistics by doxygen1.2.6 written by Dimitri van Heesch, © 1997-2001