2 :
1. , .
:
=a+bx+cx2
y=a+b/x
=b*lnx
=axb
=abx-
=+bx -
2. ,
, , .
=a+bx+cx2
Z=x2
y=a+bx+cz
.
y=a+b/x
z=1/x
y=a+bz
b=
a= -b
Z | Z | ||
0,5 | ln2 | ||
0,25 | ln4 |
z, b.
2 , , 2 :
1. - ( , , ). , , , =/(1+becx), = 1/(+b)
2. ( ).
y=+bxc
, =a*xb
log y = log a*xb
log y = lna+lnxb
log y = ln a +b ln x
log y = Y, ln a = A, ln x = X
Y=A+bX.
Y | |||
ln 1 | ln 3 | ||
ln 2 | ln 4 |
, :
ln y = A+bln x
ln y = G
y=eG
i.e. y=eA+blnx
y=eA+ebln x
y=eA+xb
b.
b - , , % 1% .
- : =f(x)*
= f(xcp)*
- :
f(x) | ||
y=a+bx | b | b* |
=a+bx+cx2 | b+2cx | |
=+b/x | -b/x2 | - |
y=a*xb | ab*x-1 | |
y=a+bln x | b/x | b/(a+bln x cp) |
y=1/(a+bx) | -b/(a+bx)2 | -bx/(a+bxcp) |
a+bxcp - . %.
, %. - .
. .
ρxy=
σ2y() =
=
, .
ρxy2=1-(σ2/σ2)=σ2/σ2
σ2=
|
|
- . , - .
F- .
F=(ρxy2/(1-ρxy2))*(n-m-1)/m
n-m-1 = k1
m=k2
m-
, , . F = (α, k1, k2)
, , .
.
2 :
1. , ;
2. . .
, 2 ( ), - 0,7. rXiXj>0,7.
, , , . , , , .
. - :
1 | 2 | 3 | ||
1 | 0,8 | |||
2 | 0,7 | 0,6 | ||
3 | 0,8 | 0,5 | 0,2 |
y=f(1, 2, 3).
, 2. 1.
(Excel- ).
, .. , 2 , , . , , , , . :
1. , ;
2. , , .
- . , - , .. - 0.
:
y=a+b1x1+b2x2+b3x3
1-
∆r= = =1
, - , .. ( 2)
∆r= =0
0. , 0 , ( =)).
|
|
1 .
. . 2 , . . :
1. , .
2. .
3. .
: 6-7 , . , . , , .. F- .