Questions tagged [poisson-distribution]
For questions relating to Poisson distributions in probability theory. To be used with [probability] or [probability-distributions] tag.
2,463 questions
1 vote
0 answers
22 views
Chance of Overlap Between Events from Two Independent Poisson Distributions
I am trying to figure out how to calculate the probability of no overlap over a given observation window between events from two independent Poisson distributions. I found a bunch of helpful stuff ...
4 votes
0 answers
304 views
Prove $E|X-\mu|^k \le \sqrt{2} \left(\frac{k\mu}e\right)^{k/2} \cosh\left(\frac{k^{3/2}}{6 \sqrt{\mu}}\right)$, where $X\sim\text{Poisson}(\mu)$
I'm trying to prove the following bound on the centered Poisson$(\mu)$ moments: $$E|X-\mu|^k \le \sqrt{2} \left(\frac{k\mu}{e}\right)^{k/2} \cosh\left(\frac{k^{3/2}}{6 \sqrt{\mu}}\right)$$ I have ...
1 vote
0 answers
23 views
Definition of a continuous branching process using Poisson random variable
As part of a course in branching processes, the teacher gave the following definition of a branching process: A stochastic process $X_t$ is called continuous-time branching process if there exists a ...
1 vote
1 answer
76 views
Expectation of a Poisson with a deductible $Z = \max(X-d,0)$
I am trying to understand the proof given for the expectation of a Poisson random variable (see also here) $X \sim P(\lambda)$, when $X$ is transformed to represent a deductible: $$Z = \max \ (X-d,0)$$...
1 vote
0 answers
31 views
Stability of the Poisson distribution in the class of infinitely divisible distributions
Prove that if the sum of two independent infinitely divisible random variables is distributed according to the Poisson law, then each of the terms is also distributed according to the Poisson law. I ...
1 vote
1 answer
32 views
Connectedness of LRT Poisson Confidence Sets, i.e., Monotonicity of the LRT Poisson Acceptance Regions
Background: Working on Exercise 9.23 (a) in "Statistical Inference, 2nd Edition" by Casella and Berger. Simply speaking, the problem asks for a $1 - \alpha$ confidence interval for a Poisson ...
0 votes
0 answers
73 views
Trying to solve an urn poblem
An urn contains 2n balls, of which 2 are numbered 1, 2 are numbered 2, ... , and 2 are numbered n. Balls are successively withdrawn 2 at a time without replacement. Let T denote the first selection in ...
0 votes
0 answers
9 views
Equivalence between two expression for the queue variable.
i'm trying to complete this exercise in Cinlar's Probability and Stochastics (Cap VI 6.53b). Context. Suppose that $M$ is a Poisson random measure, with mean measure $\nu = Leb \times Leb$ i.e, the ...
0 votes
0 answers
35 views
Rasch's argument for the separability property of a Poisson distribution with expectation $\xi = \theta\sigma$
I am trying to work through Rasch's 1961 paper On General Laws and the Meaning of Measurement in Psychology, which is one of the seminal papers in the establishment of item response theory (IRT). I am ...
0 votes
0 answers
25 views
Show that if $X$ | $\mu$ $\sim$ Poisson($\mu$) with $\mu$ $\sim$ Gamma($m,\theta$), then $X$ $\sim$ NegativeBinomial($m, \theta /(1+\theta)$) [duplicate]
On Wikipedia (https://en.wikipedia.org/wiki/Relationships_among_probability_distributions#Compound_(or_Bayesian)_relationships) I found the following statement, but no proof or reference to a proof: ...
-3 votes
1 answer
72 views
Can someone explain to me the concept/theory Taylor's Series to me simply? [closed]
I'm actually interested in the derivation of the probability mass function of the Poisson distribution which just happens to have the term Eulor's number raised to the value of negative lambda. And ...
1 vote
1 answer
82 views
Analytical methods to derive expected points from $\texttt{xG}$ differential using multidimensional integrals
In football, Expected Goals ($\texttt{xG}$) quantifies the likelihood of scoring from shots, where a team’s $\texttt{xG}= k$ is the sum of probabilities $\left\{ p_{1}, \ldots, p_{N} \right\}$ of $N$ ...
1 vote
2 answers
98 views
Doubt in Possion and Exponential Distribution co-relation
I was solving the following problem from debore: At time t = 0, 20 identical components are tested. The lifetime distribution of each is exponential with parameter λ. The experimenter then leaves the ...
4 votes
1 answer
141 views
Some basic questions about size bias coupling: Poisson approximation
I am reading the N. Ross's Fundamentals of Stein’s method. In the lecture note, section 4.3., he discussed the size-biased coupling. In the Corollary 4.14., when the size bias coupling is constructed ...
2 votes
0 answers
123 views
Can I cheat to compute the product of two Poisson-distributed variables? [closed]
The Poisson distribution of discrete random variable $X$ has the following useful property: $E[ XE[X] ] = E[ X(X-1) ]$ Does a similar property exist that is something like $E [XE[Y] ] = f$ (only X and ...