NormalDistribution

java.lang.Object

pal.statistics.NormalDistribution

public class NormalDistribution extends Object

normal distribution (pdf, cdf, quantile)

Version:: $Id: NormalDistribution.java,v 1.3 2001/07/13 14:39:13 korbinian Exp $
Author:: Korbinian Strimmer

Constructor Summary

Constructors

Constructor

Description

NormalDistribution()
Method Summary

Modifier and Type

Method

Description

static double

cdf(double x, double m, double sd)

cumulative density function

static double

mean(double m, double sd)

mean

static double

pdf(double x, double m, double sd)

probability density function

static double

quantile(double z, double m, double sd)

quantiles (=inverse cumulative density function)

static double

variance(double m, double sd)

variance

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- NormalDistribution
  
  public NormalDistribution()
Method Details
- pdf
  
  public static double pdf(double x, double m, double sd)
  
  probability density function
  
  Parameters:
  
  x - argument
  
  m - mean
  
  sd - standard deviation
  
  Returns:
  
  pdf at x
- cdf
  
  public static double cdf(double x, double m, double sd)
  
  cumulative density function
  
  Parameters:
  
  x - argument
  
  m - mean
  
  sd - standard deviation
  
  Returns:
  
  cdf at x
- quantile
  
  public static double quantile(double z, double m, double sd)
  
  quantiles (=inverse cumulative density function)
  
  Parameters:
  
  z - argument
  
  m - mean
  
  sd - standard deviation
  
  Returns:
  
  icdf at z
- mean
  
  public static double mean(double m, double sd)
  
  mean
  
  Parameters:
  
  m - mean
  
  sd - standard deviation
  
  Returns:
  
  mean
- variance
  
  public static double variance(double m, double sd)
  
  variance
  
  Parameters:
  
  m - mean
  
  sd - standard deviation
  
  Returns:
  
  variance