.
, Y , :
pi = P (X = xi) (x 1< x 2< ), p j = P (Y = yj) (y 1< y 2< ), .
.. (, Y) ( ).
.. , .
.. x 1, x 2, , xn, Y y 1, y 2, , ym , 6.1.
, .
, 6.1 .. Y, .. .
6.1
y 1 | y 2 | ××× | ym | å | |
x 1 | p 11 | p 12 | ××× | p 1 m | |
x 2 | P 21 | p 22 | ××× | p 1 m | |
××× | ××× | ××× | ××× | ××× | ××× |
xn | pn 1 | pn 1 | ××× | Pnm | |
å | ××× |
F (x, y) (x, y),
, (6.1)
.. (, Y) .. ( ..). (x, y) .. (, Y).
(6.1) . , .. , .
..
.
1) (x, y) ³ 0;
2) ;
3) , (x, y) (x, y);
4) , , .. Y ;
5) , D , .
5 , .. D .
.
,
.
(6.1) .
:
.
.
.
, Y ,
x, y.
, .. , Y , x, y.
, Y , i, j.
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