org.statcato.statistics
Class StudentTProbabilityDistribution

java.lang.Object
  extended by org.statcato.statistics.ProbabilityDistribution
      extended by org.statcato.statistics.StudentTProbabilityDistribution

public class StudentTProbabilityDistribution
extends ProbabilityDistribution

Student's T probability distribution class.

Since:
1.0
Version:
%I%, %G%
Author:
Margaret Yau

Constructor Summary
StudentTProbabilityDistribution(double v)
          Constructor given the degrees of freedom.
 
Method Summary
 double cumulativeProbability(double x)
          Returns the cumulative probabililty up to x.
 double density(double x)
          Returns the density of the distribution at x.
 double inverseCumulativeProbability(double area)
          Returns the inverse cumulative probability.
 
Methods inherited from class org.statcato.statistics.ProbabilityDistribution
inverseCumulativeProbability
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

StudentTProbabilityDistribution

public StudentTProbabilityDistribution(double v)
Constructor given the degrees of freedom.

Parameters:
v - degrees of freedom
Method Detail

density

public double density(double x)
Returns the density of the distribution at x.

Specified by:
density in class ProbabilityDistribution
Parameters:
x -
Returns:
probability density at x

cumulativeProbability

public double cumulativeProbability(double x)
Returns the cumulative probabililty up to x.

Specified by:
cumulativeProbability in class ProbabilityDistribution
Parameters:
x -
Returns:
cumulative probability P(<=x)

inverseCumulativeProbability

public double inverseCumulativeProbability(double area)
Returns the inverse cumulative probability.

Parameters:
area - cumulative probability
Returns:
inverse cumulative probability