Drawing A Exponential Regression Graph ( Y = A·e ) - Casio ClassPad 300 User Manual

Drawing a Exponential Regression Graph (
Exponential regression can be used when
The normal exponential regression formula is
y
sides, we get ln( ) = ln(
corresponds to the linear regression formula Y = A +
u ClassPad Operation
Start the graphing operation from the Statistics application's Graph window or List window.
From the Graph window
Tap [Calc] [Exponential 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: ExpR
Tap y to draw the graph.
The following is the exponential regression model formula in this case.
·
b x
y a e
= ·
a
: regression coefficient
b
: regression constant term
r
: correlation coefficient
r
2 : coefficient of determination
MSe
: mean square error
1
• MSe =
n – 2
7-5-10
Graphing Paired-Variable Statistical Data
y
is proportional to the exponential function of
.
a b x
) + . Next, if we say that Y = ln(
n
Σ
(ln (y ) – (ln (a) + b·x
i
i =1
20021201
b · x
y a e
= · )
·
b x
y a e
= · . If we obtain the logarithms of both
y
) and A = In(
.
b x
.
2
))
i
x
.
a
), the formula