Drawing A Logarithmic Regression Graph; Y A B X - Casio ClassPad 330 User Manual

Drawing a Logarithmic Regression Graph
Logarithmic regression expresses
regression formula is
to the linear regression formula
u ClassPad 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 List window
Tap [SetGraph][Setting...], or G .
On the Set StatGraphs dialog box that appears, configure a StatGraph setup with the
setting shown below, and then tap [Set].
Type: LogR
Tap y to draw the graph.
The following is the logarithmic regression model formula.
y a b
= + ·ln(
a
: regression constant term
b
: regression coefficient
r
: correlation coefficient
r
2
: coefficient of determination
MSe
: mean square error
1
• MSe =
n – 2
Graphing Paired-Variable Statistical Data
y
as a logarithmic function of
y a b x
= + · ln( ). If we say that X = ln(
y a b
= +
x
)
n
– (a + b·ln (x
Σ
(y
i
i=1
7-5-9
x
), then this formula corresponds
·X.
2
)))
i
20060301
x
. The normal logarithmic