# Questions tagged [random-variable]

A random variable or stochastic variable is a value that is subject to chance variation (i.e., randomness in a mathematical sense).

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### Correct or Not? Probability and Geometry [closed]

A stick of length $1$ is broken into two pieces of length $Y$ and $1−Y$ respectively, where $Y$ is uniformly distributed on $[0,1]$. Let $R$ be the ratio of the length of the shorter to the ...
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### Poisson and Gamma distribution for testing randomness

In genetics I want to test whether InDel (insertion and deletion in DNA) sizes occurs with the same probability. I heard that I should gamma distribution to model it. I found ...
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### What is the distribution of the difference of two iid noncentral Student t variates

Let $X_1$ and $X_2$ be iid non-central t random variables. I'm interested in the question: what is the distribution of $X_1 - X_2$? i.e. what is the distribution of the difference of two iid ...