Poisson distribution functions
PDFPoisson(x,lambda)
PDFPoisson(x,lambda) returns the probability density at the value x of the Poisson distribution with parameter lambda.
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CDFPoisson(x,lambda)
CDFPoisson(x,lambda) returns the value at x of the Poisson cumulative distribution with parameter lambda.
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RndPoisson(lambda)
RndPoisson(lambda) returns a random number from the Poisson distribution with parameter lambda.
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