# Multivariate distribution : Mean vector?

1. Nov 21, 2009

### aslanbey42

Hello friends.My English is bad :) .I'll try to explain my trouble.

In question: Q function according to x1 and x2 are substitutes when the joint comes out of solution. Of the solution in theory I do not understand where they come from.Is there another solution or the problem? Where is the theoretical? Can you please explain mathematically?

----Question---

Probabilty density function:

$$f(x)=\frac{1}{\pi}\left(exp\left(\frac{-1}{2}\left(9x^{2}_{1}+2x^{2}_{2}+8x_{1}x_{2}-20x_{1}-8x_{2}+44\right)\right)\right)$$

Multivariate normal distibitions

mean vector of the universe?

$$\mu=\left(2,-2\right)$$

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Thanks

2. Nov 22, 2009