... 7 12 2,7 12 604 2, 6 x= 8 426 y=34,1 (x- x ) 2 = (y-y) 2 = (x-x )(y-y)=n = 12 (x- x ) 2 /(n-1)= (y-y) 2 /(n-1)= x =x/n= y=y/n= (x-x ) 2 /(n-1) = (y-y) 2 /(n-1) = (x- x )(y-y)r ... x - x (x - x ) 2 y - y(y - y) 2 (x - x )(y - y)1 723 2, 9 2 717 2, 8 3 629 3,9 4 705 2, 6 5 708 2, 9 6 760 2, 8 7 698 2, 9 8 760 2, 7 9 714 2, 8 10 696 2, 5 11 7 12 ... 20 .40 0- 52. 560 15 0 -2 92 0, 8-0 ,9 17 0 -2 00 Lợn Landrace 15 0 -2 00 0, 8-0 ,9 15 0-1 90 18.00 0- 34 .20 0 Dơng Đình Long (1996)Lợn Móng Cái 9 0-1 70 0, 7-0 ,9 3 2- 5 8 2. 01 6-8 .874 Bò Holstein 5,76 0, 62 894,8...