Casio fx-3650P - Manual (Page 35)

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