# Questions tagged [exponential-distribution]

To be used for questions on using, finding, or otherwise relating to Exponential Distributions.

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### Joint distribution and covariance of poisson process and waiting time

Hi I am having a trouble solving for this problem where I have to find 1) Joint distribution of $W_{1}$, $W_{r}$ for $r\geq2$. 2) $\operatorname{Cov}(W_{1},W_{r})$ for $r\geq2$. [Notation ...
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### An exponential distribution that represents time between events

You're responsible for maintaining four ATMs (E,W,N, and S). The time between failures for each ATM is exponentially distributed with mean time between failures 6 hours, 5 hours, 8 hours, and 8 hours, ...
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### Density function of product of random variables.

I've got the next question: Let $X,Y$ independent random variables such that: $$X \sim Unif(-1,0) \quad \mbox{ and } \quad Y \sim Unif(0,1).$$ Find the density function of $Z=XY$ using the density ...
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### Exponential random variable problem

I have an exercise that give me a lot of problems during the resolution and I hope in your help... The statement following... We have an exponential random variable with variance $\sigma ^{2}$, with ...
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### Poisson or exponential distribution

I have to complete the question for a homework task and I'm confused if it is a Poisson or exponential distribution. any insight would be appreciated. Voters arrive at a polling booth in a town ...
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