Casio fx-3650P User Manual page 35

5 Inverse Regression
u Regression coefficient A
Σy
–
A =
u Correlation coefficient
Sxy
r
=
Sxx . Syy
Σ
Sxx x
= (
Σ
Sxy x
= (
6 Quadratic Regression
u Regression coefficient A
Σy
A = – B
n
u Regression coefficient B
xy .
B = (S
u Regression coefficient C
y .
C x 2
= S
Σx
Sxx
=
Σx
Sxx 2
=
Σx
2
Sx y
=
B . Σx
–1
n
r
Σx
–1 2
( )
, Syy
–1 2
) –
n
. Σy
Σx
–1
–1 y
) –
n
Σx Σx
( ) ( )
– C
n n
y .
x 2 x 2 x 2 xx
S – S S
xy .
xx xx
S – S S
Σx
2
( )
2
Sxy
– , =
n
Σx . Σx
2
( )
3 Sx
– ,
n
. Σy
Σx
2
( )
2
y
–
n
1
y x
= A + B /
u Regression coefficient B
Sxy
B =
Sxx
Σy
(
Σy
2
= –
n
y x
= A + B + C
2
) ÷ {S xx .
2 x 2
S
2
Σx . Σy
(
Σxy
–
n
Σx
(
Σx
2 x 2 4
= –
E-33
2
)
2
x
x 2 xx 2 2
– (S ) }
)
2 2
)
n