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The following is the sinusoidal regression model formula.
y
=
a
·sin(
b
·
x
+
c
) +
d
Tip
• Make sure that “Radian” is selected for the [Angle] setting on the Basic Format dialog box (page
1-9-4) before drawing a sinusoidal regression graph. The graph cannot be drawn correctly when
the [Angle] setting is “Degree”.
• Certain types of data may cause calculation to take a long time. This is normal and does not
indicate malfunction.
Drawing a Sinusoidal Regression Graph (
y
=
a
·sin(
b
·
x
+
c
) +
d
)
Sinusoidal regression is best for data that repeats at a regular fixed interval over time.
u
ClassPad Operation
Start the graphing operation from the Statistics application’s Graph window or List window.
From the Graph window
Tap [Calc] [Sinusoidal 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: SinR
Tap
y
to draw the graph.
7-5-13
Graphing Paired-Variable Statistical Data
• MSe =
Σ
1
n – 2
i=1
n
(y
i
– (a·sin (b·x
i
+ c) + d ))
2