Casio FX-991ES User Guide - Page 53

Commands when Quadratic Regression Calculation, Is Selected

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Reg Sub-menu (11(STAT)7(Reg)) Select this menu item: When you want to obtain this: 1A Regression coefficient constant term A 2B Regression coefficient B 3r 4m 5n Correlation coefficient r Estimated value of x Estimated value of y Appendix Linear Regression Calculation: to • Examples through all use the data input in Example . *1 Estimated Value (y = -3 → m = ?) *2 Estimated Value (x = 2 → n = ?) Commands when Quadratic Regression Calculation (_+CX2) Is Selected With quadratic regression, regression is performed in accordance with the following model equation. y = A + BX + CX 2 See Appendix for information about the calculation formula used for each command. Reg Sub-menu (11(STAT)7(Reg)) Select this menu item: 1A 2B 3C 4m1 5m2 6n When you want to obtain this: Regression coefficient constant term A Linear coefficient B of the regression coefficients Quadratic coefficient C of the regression coefficients Estimated value of x1 Estimated value of x2 Estimated value of y • Sum sub-menu (sums), Var sub-menu (number of samples, mean, standard deviation), and MinMax sub-menu (maximum value, minimum value) operations are the same those for linear regression calculations. Appendix Quadratic Regression Calculation: to • Examples through all use the data input in Example . E-51

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E-51
Reg Sub-menu (
1
1
(STAT)
7
(Reg))
Select this
When you want to obtain this:
menu item:
1
A
Regression coefficient constant term A
2
B
Regression coefficient B
3
r
Correlation coefficient
r
4
m
Estimated value of
x
5
n
Estimated value of
y
Appendix
Linear Regression Calculation: <#061> to <#064>
•
Examples <#062> through <#064> all use the data input in Example
<#061>.
*1 Estimated Value
(
y
= –3
→
m
= ?
)
*2 Estimated Value
(
x
= 2
→
n
= ?
)
Commands when Quadratic Regression Calculation
(_+CX
2
) Is Selected
With quadratic regression, regression is performed in accordance
with the following model equation.
y
=
A
+
BX
+
CX
2
See
Appendix
<#065> for information about the calculation
formula used for each command.
Reg Sub-menu (
1
1
(STAT)
7
(Reg))
Select this
When you want to obtain this:
menu item:
1
A
Regression coefficient constant term A
2
B
Linear coefficient B of the regression coefficients
3
C
Quadratic coefficient C of the regression
coefficients
4
m
1
Estimated value of
x
1
5
m
2
Estimated value of
x
2
6
n
Estimated value of
y
•
Sum sub-menu (sums), Var sub-menu (number of samples, mean,
standard deviation), and MinMax sub-menu (maximum value,
minimum value) operations are the same those for linear regression
calculations.
Appendix
Quadratic Regression Calculation: <#066> to <#068>
• Examples <#066> through <#068> all use the data input in
Example <#061>.