3 Attachment(s)

2D table of random variables

We have two random variables.

Attachment 23650

Attachment 23651

I would like to know how to get the probabilities **p1,** **p2,** **p3** ... of two random variable in a table?

Attachment 23652

I just know that the sum of all probabilites **p1**, **p2**, **p3.**.. must be equal to **1**!

Re: 2D table of random variables

Quote:

Originally Posted by

**Nforce** We have two random variables.

Attachment 23650 Attachment 23651
I would like to know how to get the probabilities

**p1,** **p2,** **p3** ... of two random variable in a table?

Attachment 23652
I just know that the sum of all probabilites

**p1**,

**p2**,

**p3.**.. must be equal to

**1**!

Just let $\displaystyle m=1,~2,~3~\&~n=1,~2,~3$ form a matrix $\displaystyle J=\left(a_{m,n}\right)$ where $\displaystyle a_{m,n}=P(x_m)\cdot P(y_n)$.

Re: 2D table of random variables

Thank you, the sum is really 1. Can I ask is this a general rule? Is correlation or dependence effect this?