E-42
Statistical Calculation
Model Equation
Calculation
Type
Formula
ab
Exponential Regression
y
=
AB
X
<#057>
(A•B^X)
Power Regression (A•X^B)
y
=
AX
B
<#058>
Inverse Regression (1/X)
y
=
A
+
X
B
<#059>
Appendix
Comparison of Regression Curves
• The following example uses the data input in Example <#047>.
<#060> Compare the correlation coefficient for logarithmic,
e
exponential,
ab
exponential, power, and inverse regression.
(FREQ: OFF)
Appendix
Other Types of Regression Calculation: <#061> to
<#065>
Command Usage Tips
• The commands included in the Reg sub-menu can take a long
time to execute in logarithmic,
e
exponential,
ab
exponential, or
power regression calculation when there are a large number of
data samples.
Equation Calculations
(EQN)
All calculations in this section are performed in the EQN Mode
(
N
3
).
k
Equation Types
An equation type menu appears when you press
N
3
(EQN) and
enter the EQN Mode.
Key
Menu Item
Equation Type
Simultaneous Linear
1
a
n
X + b
n
Y = c
n
Equations with Two
Unknowns
Simultaneous Linear
2
a
n
X + b
n
Y + c
n
Z = d
n
Equations with Three
Unknowns
3
aX
2
+ bX + c = 0
Quadratic Equation
4
aX
3
+ bX
2
+ cX + d = 0
Cubic Equation
