E-28
r
e
Regression Calculations
Use the
F
key to enter the REG Mode when you want to perform
statistical calculations using regression.
REG ..........................................................................................
F
F
2
• Entering the REG Mode displays screens like the ones shown below.
To recall this type of value:
Perform this key operation:
Σ
x
2
A
U
1
Σ
x
A
U
2
n
A
U
3
Σ
y
2
A
U
r
1
Σ
y
A
U
r
2
Σ
xy
A
U
r
3
o
A
X
1
x
σ
n
A
X
2
x
σ
n
-1
A
X
3
p
A
X
r
1
REG
1 2 3
L i n Log Ex p
1 2 3
Pw r I nv Quad
• Press the number key (
1
,
2
, or
3
) that corresponds to the type of
regression you want to use.
1
(Lin) :
Linear regression
2
(Log) :
Logarithmic regression
3
(Exp) :
Exponential regression
r
1
(Pwr) :
Power regression
r
2
(Inv) :
Inverse regression
r
3
(Quad) : Quadratic regression
• Always start data input with
A
B
1
(Scl)
<
to clear statistical memory.
• Input data using the key sequence shown below.
<
x
-data>
P
<
y
-data>
S
• The values produced by a regression calculation depend on the values
input, and results can be recalled using the key operations shown in the
table below.
