User Manual

Statistics
Exponential Curve Fit
•
y = Ae
Bx
•
B =
Σx
i
ln y
i
-
1
n
(Σx
i
)(Σln y
i
)
Σx
i
2
-
1
n
(Σx
i
)
2
•
A = exp
Σln y
i
n
- B
Σx
i
n
•
= -Ae
Bx
Logarithmic Curve Fit
•
y = A + B(ln x)
•
B =
Σy
i
ln x
i
-
1
n
Σln x
i
Σln y
i
Σ(ln x
i
)
2
-
1
n
(Σln x
i
)
2
•
A =
1
n
(Σy
i
- BΣln x
i
)
•
= A + B(ln x)
Power Curve Fit
•
y = Ax
B
(A>0)
•
ln y = ln A + Bln x
•
B =
(Σln x
i
)(Σln y
i
)