Casio FX-820MS User Manual
Page 29
E-27
Coefficient of Determination = 0.965517241
A X r r 3 K =
Sample Covariance = 35
E A U r 3 ,
A U 3 - A X 1 -
A X r 1 F \
E A U 3 ,
1
F =
uLogarithmic, Exponential, Power, and Inverse
Regression
• Use the same key operations as linear regression to re-
call results for these types of regression.
• The following shows the regression formulas for each
type of regression.
Logarithmic Regression y
҃ A ѿ B ؒ In x
Exponential Regression y
҃ A ؒ
e
B
·
x
(In y
҃ In A + Bx)
Power Regression
y
҃ A ؒ
x
B
(In y
҃ In A + BIn x)
Inverse Regression
y
҃ A ѿ B ؒ
1
/
x
x
i
y
i
29
1.6
50
23.5
74
38.0
103
46.4
118
48.0
uQuadratic Regression
• The regression formula for quadratic regression is:
y
= A + B
x
+ C
x
2
.
• Example:
Perform quadratic regression to de-
termine the regression formula terms
for the data nearby. Next, use the
regression formula to estimate the
values for
n
(estimated value of
y
) for
x
i
= 16 and
m
(estimated value of
x
)
for
y
i
= 20.
In the REG Mode:
r 3
(Quad)
A
B
1
(Scl)
=
(Stat clear)
29
P
1.6
S
50
P
23.5
S
74
P
38.0
S
103
P
46.4
S
118
P
48.0
S
Regression Coefficient A =
–35.59856934
A X r r 1 =
Regression Coefficient B =
1.495939413
A X r r 2 =