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Statistics[Distributions]

  

NonCentralBeta

  

noncentral beta distribution

 

Calling Sequence

Parameters

Description

Notes

Examples

References

Calling Sequence

NonCentralBeta(nu, omega, delta)

NonCentralBetaDistribution(nu, omega, delta)

Parameters

nu

-

first shape parameter

omega

-

second shape parameter

delta

-

noncentrality parameter

Description

• 

The noncentral beta distribution is a continuous probability distribution with probability density function given by:

ft=0t<0&ExponentialE;δ2t1+ν1tω1k=0δt2kk!Βω&comma;ν+kt10otherwise

  

subject to the following conditions:

0<ν,0<ω,0δ

• 

The NonCentralBeta variate with noncentrality parameter delta=0 and shape parameters nu and omega is equivalent to the Beta variate with shape parameters nu and omega.

• 

Note that the NonCentralBeta command is inert and should be used in combination with the RandomVariable command.

Notes

• 

The Quantile and CDF functions applied to a noncentral beta distribution use a sequence of iterations in order to converge on the desired output point.  The maximum number of iterations to perform is equal to 100 by default, but this value can be changed by setting the environment variable _EnvStatisticsIterations to the desired number of iterations.

Examples

withStatistics&colon;

XRandomVariableNonCentralBeta5&comma;7&comma;9&colon;

PDFX&comma;u

0u<0&ExponentialE;92u41u6&ExponentialE;9u253144110240u7+45467735120u6+1515591256u5+2525985128u4+2806658u3+1309774u2+14553u+2310u10otherwise

(1)

PDFX&comma;0.5

2.428158722

(2)

MeanX

2140380503348678440114129561600&ExponentialE;923486784401

(3)

VarianceX

1539933930549285216412157665459056928801199644511008194560000&ExponentialE;−912157665459056928801+1407109365778350080000&ExponentialE;9212157665459056928801

(4)

References

  

Evans, Merran; Hastings, Nicholas; and Peacock, Brian. Statistical Distributions. 3rd ed. Hoboken: Wiley, 2000.

  

Johnson, Hormal L.; Kotz, Samuel; and Balakrishnan, N. Continuous Univariate Distributions. 2nd ed. 2 vols. Hoboken: Wiley, 1995.

  

Stuart, Alan, and Ord, Keith. Kendall's Advanced Theory of Statistics. 6th ed. London: Edward Arnold, 1998. Vol. 1: Distribution Theory.

See Also

Statistics

Statistics[Distributions]

Statistics[RandomVariable]