12
i (åij) ( ) (åij) i ( ).
i = i / å i .
å i =1
.
:
22, 13, 6 20 21, 18, 16, 4 - , 21, 18,
. 12 . 16, 4 22, 13
. 3 . 6
. 20 22, 13, 6.
. , .
, .
() . - , .
n
n ( )
- () , .