# Linked Questions

1answer
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### Var(XY), if X and Y are independent random variables [duplicate]

if X and Y are independent Random variable then what is the variance of XY?
0answers
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### How to calculate variance or standard deviation for product of two normal distributions? [duplicate]

For example if I have two multiplied distributions a * b: ...
0answers
795 views

### Define $Var(XY)$ in terms of $E(X)$, $E(Y)$, $Var(X)$, $Var(Y)$ for Independent Random Variables $X$ and $Y$ [duplicate]

I currently know: $$Var(XY)=E(X^2Y^2)−[E(XY)]^2$$ $$=E(X^2)E(Y^2)−[E(X)]^2[E(Y)]^2$$ but I am lost where to go from there. I can vaguely see the the formula $Var(X)=E(X^2)-E(X)^2$ hidden somewhere, ...
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0answers
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I know that the sum of two Wrapped Normal Variables is a Wrapped Normal Variable. In particular, if $\theta_1 \sim WN(\mu_1, \rho_1)$ and $\theta_2 \sim WN(\mu_2, \rho_2)$, then $\theta_1 + \theta_2 \... 0answers 97 views ### How can I calculate the probability that the product of two independent random variables does not exceed$L$? I have one variable,$X$, which is provided hourly for a period of one month (720 total values in the series). I have another variable,$Y$, which is provided quarterly (for which I am provided the ... 0answers 85 views ### Finding the best predictor Brownian motion I want to find the best predictor of$(B_3-B_2)(B_4-B_{\pi})$given an observation of$B_1$Where$B_t$is brownian motion for time$t \geq 0\$. I am not sure how to approach this. I know it will be ...

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