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java.lang.Objectpal.statistics.GammaDistribution
pal.statistics.ChiSquareDistribution
public class ChiSquareDistribution
chi-square distribution (distribution of sum of squares of n uniform random variables) (Parameter: n; mean: n; variance: 2*n) The chi-square distribution is a special case of the Gamma distribution (shape parameter = n/2.0, scale = 2.0).
Constructor Summary | |
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ChiSquareDistribution()
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Method Summary | |
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static double |
cdf(double x,
double n)
cumulative density function of the chi-square distribution |
static double |
mean(double n)
mean of the chi-square distribution |
static double |
pdf(double x,
double n)
probability density function of the chi-square distribution |
static double |
quantile(double y,
double n)
quantile (inverse cumulative density function) of the chi-square distribution |
static double |
variance(double n)
variance of the chi-square distribution |
Methods inherited from class pal.statistics.GammaDistribution |
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cdf, mean, pdf, quantile, variance |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ChiSquareDistribution()
Method Detail |
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public static double pdf(double x, double n)
x
- argumentn
- degrees of freedom
public static double cdf(double x, double n)
x
- argumentn
- degrees of freedom
public static double quantile(double y, double n)
x
- argumentn
- degrees of freedom
public static double mean(double n)
n
- degrees of freedom
public static double variance(double n)
n
- degrees of freedom
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