3.3
(%) | ||
RA | RB | |
|
. , , , , , :
R = { R 1; R 2; ; RT } , , Rt t - (t = 1,, T), , R.
RA , , RB . :
M (RA) = 1/5 × (5 + 3 + 2 + 3 + 7) = 4;
M(RB) = 1/5 × (3 + 5 + 6 + 5 + 1) = 4;
V (RA) = 1/4 × ((5 4)2 +(3 4)2+(2 4)2+(3 4)2+(7 4)2) = 4;
V(RB) = 1/4 × ((3 4)2+(5 4)2+(6 4)2+(5 4)2+(1 4)2) = 4,
M (RA), M (RB), V (RA) V (RB) , .
. a1 = 0; a2 = 1; a3 = 1; a4 = 1; a5 = 0, :
WA = SV (RA) = 1/3×(02 + ( 1)2 + ( 2)2 + ( 1)2 + 02) = 2.
: a1 = 1; a2 = 0; a3 = 0; a4 = 0; a5 = 1.
WB = SV (RB) = 1/2 × (( 1)2 + 02 + 02 + 02 + ( 3)2) = 5.
WA<WB, , , . -
! 3.2. , ( < 15),
3.4.5.4.
:
,
:
.
, , , - ( ).
, :
,
SG (X) SSG (X) , a j j- .
SG (X) 䳺, , , SG (X) ( SSG (X)).
3.10. ( RA RB), , .3.4.
|
|
3.4
, % | , % | ||||
t | RA | RB | t | RA | RB |
6,90 | 3,71 | 7,14 | 5,06 | ||
12,67 | 4,90 | 2,81 | 5,92 | ||
3,33 | 1,73 | 11,25 | 7,67 | ||
6,45 | 2,67 | 1,71 | 4,94 | ||
2,16 | 3,88 | 3,27 | 2,81 |
( )?
! . XA = RA /100%, XB = RB / 100%.
, , G (RA) = 4,196%. , G (RB) = 4,316%.
RA RB 䳺. G (R+A) G (R+B) 䳺. G (RB) > G (RA), .
:
().
s G (RA) = 5,551; s G (RB) = 1,743, .
G (RA) = 4,196,
SG (RA) = = (( 3,33 4,196)2 + ( 2,16 4,196)2 +
+ (3,27 4,196)2) = 11,089;
SSG (RA) = = 3,33(%).
:
G (RB) = 4,316%; SG (RB) = 1,358; SSG (RB) = 1,165.
, , , .
, . -
, . , , .
, , , , .
ϳ , , .
:
W , (. .), K .