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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
(N3).
k Equation Types
An equation type menu appears when you press N3(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