A B X - Casio ClassPad 330 User Manual

Drawing an Exponential Regression Graph (
Exponential regression can be used when
x
. The normal exponential regression formula in this case is
logarithms of both sides, we get ln(
a
A = ln( ) and B = ln(
u ClassPad Operation
Start the graphing operation from the Statistics application's Graph window or List window.
From the Graph window
Tap [Calc] [abExponential 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: abExpR
Tap y to draw the graph.
The following is the exponential regression model formula in this case.
y a b
x
= ·
a
: regression coefficient
b
: regression constant term
r
: correlation coefficient
r
2
: coefficient of determination
MSe
: mean square error
• MSe =
n – 2
Graphing Paired-Variable Statistical Data
y
) = ln(
b
), the formula corresponds to the linear regression formula Y = A + B·
1
n
) – (ln (a) + (ln (b)) . x
Σ
(ln (y
i
i=1
7-5-11
y a b
= ·
y
is proportional to the exponential function of
y
=
a b x
) + (ln( )) · . Next, if we say that Y = ln(
2
))
i
20060301
x
)
a b
x
· . If we take the natural
y
),
x
.