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Drawing a Logarithmic Regre
Logarithmic regression expresses
regression formula is
to the linear regression formula
Cla
Pad Operation
Start the graphing operation from the Statistics application's Graph window or List window.
From the Graph window
Tap [Calc] [Logarithmic Reg] [OK] [OK]
From the Li t window
Tap [SetGraph][Setting...], or
On the Set StatGraphs dialog box that appears, configure a StatGraph setup with the
setting shown below, and then tap [Set].
Type: LogR
Tap
to draw the graph.
The following is the logarithmic regression model formula.
y
a
b
x
=
+
·ln(
a
:
regression constant term
b
:
regression coefficient
r
:
correlation coefficient
2
r
:
coefficient of determination
MSe
: mean square error
1
• MSe =
n – 2
Graphing Paired-Variable Statistical Data
ion Graph
y
as a logarithmic function of
y
a
b
x
=
+
· ln(
). If we say that X = ln(
y
a
b
=
+
·X.
.
)
n
(y
– (a + b·ln (x
i
i=1
7-5-9
x
), then this formula corresponds
.
2
)))
i
20060301
x
. The normal logarithmic
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