- , , - X - Y .
(concomitant variation) - - Y, . , .
: , . . - , - . , . . , , , .
1000 . . 7.1. . , . .
7.1.
, Y
, X 363 (73%) 137 (27%) 500 (100%)
322 (64%) 178 (36%) 500 (100%)
, 73% , 64%. , .
, , ? , ! , , , , . , ? , . . 7.2 . yp . . . 7.2 , . , . 7.1, .
|
|
7.2.
, X 122 (61%) 78 (39%) 200 (100%)
171 (57%) 129 (43%) 300 (100%)
, X 241 (80%) 59 (20%) 300 (100%)
151 (76%) 49 (24%) 200 (100%)
, . , , . - .