# Tagged Questions

Bivariate (two-variable) probability distributions.

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### Estimation of stochastic parameters in bivariate Poisson model

I need to estimate parameters in bivariate Poisson model. Formulas for parameters: $\lambda_1= exp (\alpha_i-\beta_i+\delta)$ $\lambda_2= exp (\alpha_j-\beta_j)$ where delta is some constant, alpha ...
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### joint probability distribution [closed]

Two four-sided dice with numbers 1,…,4 on the faces are thrown. Let the two discrete random variables U and V, be the sum of the outcomes for the individual dice and their product respectively. (i) ...
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### Do I have a correlation here or not?

I am writing my thesis at the moment and I am pretty new with statistics. I tired to google around but I don’t know what to do anymore, since I don’t really find an answer in this case. I hope you can ...
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### Find data and confidence “ellipses” (regions?) for a bivariate median?

I'm wondering about ways to compute data and confidence ellipses around a bivariate median. For example, I can easily compute a data ellipse or a confidence ellipse for the bivariate mean of the ...
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### Bivariate probit model with sample selection

Could you please provide an example and explanation why to use the bivariate probit model with sample selection? In this context, to what sample selection bias refers to?
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### Finding a valid bivariate distribution

For each of the following functions, determine the constant $c$ so that $f(x,y)$ satisfies the conditions of being a joint pmf for two discrete random variables $X$ and $Y$: (c) $f(x,y) = c$; $x$ and ...
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