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Questions tagged [poisson]

The Poisson distribution is a statistical discrete distribution for describing events occurring at random intervals. It is defined on the non-negative integers that has the property in which the mean is equal to the variance.

The Poisson probability distribution is used to model the probability of a number of events occurring during a specified time interval.

The Poisson distribution is characterized by an expected arrival rate, usually designated by the Greek lower-case letter lambda.

A discrete random variable X has a Poisson distribution indexed by a parameter λ if it has probability mass function as following:

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Useful links:

Wikipedia entry for the Poisson distribution.

How do I generate discrete random events with a Poisson distribution?

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How to add a Poisson distribution curve that approaches 3?

I want to add a curve to an existing plot. This curve should be a poisson distribution curve that approaches the mean 3. I've tried this code points is a vector with 1000 values plot(c(1:1000), points,type="l") abline(h=3) x = 0:1000 curve(dnorm(x,…
wellokaythen
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Parse poisson function in javascript to php

I have the next code in javascript: var exponential = 2.71828182845904523536028747135266249775724709369995957496696762772407663035354759457138217852516642742746; var numerator, denominator; function fact(x) { if(x==0) { return 1; } return x *…
krosgore
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fitting a mixed model

I want to fit a mixed model to look at between regions variation in disease cases with first level being at postcode and second level as region using poisson regression with covariates being max temp, mean temp, min temp. I have 3 regions coded as…
Joshua Onyango
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marginal effects options, margins versus irr

I am estimating a Poisson regression and want to estimate the economic significance of my coefficients (marginal effects). I have three methods that have been suggested to me: margins, dydx(_all) margins, dydx(_all) atmeans poisson, irr I am…
samuraiexe
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Java a function for Poisson Distribution to obtain Quantile

A challenge for me is to use Java to obtain Poisson Distribution quantile （an integer）. As I am new to Java, I googled a lot and wrote some code, not sure this is correct or not, could someone help me on it? According to Poisson Distribution pdf…
Chenxi
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C : My 'Poisson calculator' gives me #1.INF00. Why does this happen?

Before anything, here's my code: #include #include #include main() { float Exp, Act, Px, Facto_Act; printf("\n This is Poisson Distribution Calculator!"); printf("\n Enter the expected value of success in a…
Aakmal Yusop
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The main method of poisson for Random number generation

please I saw a method that implements the Poisson distribution function to generate random numbers and I have no idea how to run it. Can someone please help me with the main method that can print the random numbers? Below are the codes: public…
Miji05
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