Drawing A Linear Regression Graph - Casio ClassPad 300 User Manual

Drawing a Linear Regression Graph

Linear regression uses the method of least squares to determine the equation that best fits
your data points, and returns values for the slope and
of this relationship is a linear regression graph.
u ClassPad Operation
Start the graphing operation from the Statistics application's Graph window or List window.
From the Graph window
Tap [Calc] [Linear 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: LinearR
Tap y to draw the graph.
The following is the linear regression model formula.
y a·x b
= +
a
: regression coefficient (slope)
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
-intercept)
1 n
Σ
(y – (a·x + b))
i i
i=1
7-5-5
y
-intercept. The graphic representation
2
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