Class JSci.maths.statistics.ChiSqrDistribution
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Class JSci.maths.statistics.ChiSqrDistribution

java.lang.Object
   |
   +----JSci.maths.statistics.ProbabilityDistribution
           |
           +----JSci.maths.statistics.ChiSqrDistribution

public final class ChiSqrDistribution
extends ProbabilityDistribution
The ChiSqrDistribution class provides an object for encapsulating chi-squared distributions.

Constructor Index

 o ChiSqrDistribution(double)
Constructs a chi-squared distribution.

Method Index

 o cumulative(double)
Cumulative chi-squared distribution function.
 o getDegreesOfFreedom()
Returns the degrees of freedom.
 o inverse(double)
Inverse of the cumulative chi-squared distribution function.
 o probability(double)
Probability density function of a chi-squared distribution.

Constructors

 o ChiSqrDistribution
  public ChiSqrDistribution(double dgr)
Constructs a chi-squared distribution.
Parameters:
dgr - degrees of freedom

Methods

 o getDegreesOfFreedom
  public double getDegreesOfFreedom()
Returns the degrees of freedom.
 o probability
  public double probability(double X)
Probability density function of a chi-squared distribution.
Returns:
the probability that a stochastic variable x has the value X, i.e. P(x=X)
Overrides:
probability in class ProbabilityDistribution
 o cumulative
  public double cumulative(double X)
Cumulative chi-squared distribution function.
Returns:
the probability that a stochastic variable x is less then X, i.e. P(x<X)
Overrides:
cumulative in class ProbabilityDistribution
 o inverse
  public double inverse(double probability)
Inverse of the cumulative chi-squared distribution function.
Returns:
the value X for which P(x<X)
Overrides:
inverse in class ProbabilityDistribution

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