Casio fx-50F Manual De Usuario
E-49
Command
Calculation Formula
Estimated Value
m
m
=
ln
b
lny – ln
a
Estimated Value
n
n =
ab
x
Power Regression
Command
Calculation Formula
Regression Formula
Constant Term a
Constant Term a
a = exp
(
)
n
Σ
ln
y
i
–
b
.Σ
ln
x
i
Regression Coeffi cient b
b =
n.
Σ
(ln
x
i
)
2
–
(
Σ
ln
x
i
)
2
n.
Σ
ln
x
i
ln
y
i
–
Σ
ln
x
i
.Σ
ln
y
i
Correlation Coeffi cient r
r
=
{
n.
Σ
(ln
x
i
)
2
–
(
Σ
ln
x
i
)
2
}{
n.
Σ
(ln
y
i
)
2
–
(
Σ
ln
y
i
)
2
}
n.
Σ
ln
x
i
ln
y
i
–
Σ
ln
x
i
.Σ
ln
y
i
Estimated Value
m
m
=
e
b
ln y – ln a
Estimated Value
n
n =
a
x
b
Inverse Regression
Command
Calculation Formula
Regression Formula
Constant Term a
Constant Term a
a =
n
Σy
i
–
b
.Σx
i
–1
Regression Coeffi cient b
b =
Sxx
Sxy
Correlation Coeffi cient r
r
=
Sxx.Syy
Sxy
However,
Sxx
=
Σ
(
x
i
–1
)
2
–
Syy
=
Σy
i
2
–
Sxy
=
Σ
(
x
i
–1
)
y
i
–
n
(
Σx
i
–1
)
2
n
Σx
i
–1
.Σy
i
n
(
Σy
i
)
2
Sxx
=
Σ
(
x
i
–1
)
2
–
Syy
=
Σy
i
2
–
Sxy
=
Σ
(
x
i
–1
)
y
i
–
n
(
Σx
i
–1
)
2
n
Σx
i
–1
.Σy
i
n
(
Σy
i
)
2