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We have two random variables.
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I would like to know how to get the probabilities p1, p2, p3 ... of two random variable in a table?
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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 $\displaystyle a_{m,n}=P(x_m)\cdot P(y_n)$.Quote:
Originally Posted by Nforce
Thank you, the sum is really 1. Can I ask is this a general rule? Is correlation or dependence effect this?
