() .
: = u^. , , :
- = (â0 + â1x+ u^) (â0 + â1 ) = â1 (x - ) + u^
- ) 2 = â1 (x - ))2 + 2 â1 x - ) u + =
= â1 (x - ))2 + 2 â1 x - )(( - ) â1 (x - )) + .
â1 = , = â1 ,
.
= - )2 + .
( ) Du = = yi yi^.
D = yi .
Dy^ = â1 (x - )) 2 = - )2 yi^ .
: D = D y^ + Du, = - )2 + .
R2 = 1 - = (0;1)
Y, Y.
, R2 ¢, : (¢ );
0 ;
.
R =√ R2 (-1;1) :
¢ Y, R 1,
¢ Y, R 0.
, R > 0, Y , R > 0 ^1 > 0;
R < 0, Y , R < 0 ^ 1 < 0;
R (X,Y) = 0, X Y .
( ) ả0: s ả0 = s u^
( ) ả1 sả1 = su^
:
()
Y* - tα; (n-2) σ u^ < Y* < Y* + tα; (n-2) σ u^
ta - ', α- , k = n - 2 .
1
.
2. :
Y
: : : (; Y)
˳ : .
: .