Owner's manual
55
(STAT)
(Reg)
(B)
(STAT)
(Reg)
(r)
* (STAT) (Reg)
()
** (STAT) (Reg)
()
* Estimated Value (y = 3
→
= ?)
** Estimated Value (x = 2
→
= ?)
Commands when Quadratic Regression
Calculation (_+CX) Is Selected
With quadratic regression, regression is performed in
accordance with the following model equation.
y = A + BX + CX
2
For example:
x
ˆ
y
ˆ
x
ˆ
y
ˆ
A
y
n
-------- B
x
n
--------
– C
x
2
n
-----------
–=
B
Sxy Sx
2
x
2
Sx
2
ySxx
2
•–•
Sxx Sx
2
x
2
Sxx
2
()
2
–•
---------------------------------------------------------------- -=
C
Sx
2
ySxxSxySxx
2
•–•
Sxx Sx
2
x
2
Sxx
2
()
2
–•
-----------------------------------------------------------=
Sxx x
2
x
()
2
n
----------------–=
Sxy xy
xy
•
n
-----------------------–=
Sxx
2
x
3
xx
2
•
n
-------------------------–=