Power Regression Graph; Sinusoidal Regression Graph - Casio fx-9860G Series User Manual

Calculating and Graphing Paired-Variable Statistical Data
k Power Regression Graph
Power regression expresses
regression formula is
a b x
In + × In . Next, if we say X = In
linear regression formula Y = A +
1 (CALC)6 ( )4 (Pwr)
6 (DRAW)
The following is the power regression model formula.
y a x b
= ·
a
...............regression coeffi cient
b
...............regression power
r
...............correlation coeffi cient
r
2
.............coeffi cient of determination
MSe
........mean square error
k Sinusoidal Regression Graph
Sinusoidal regression is best applied for cyclical data.
The following is the sinusoidal regression model formula.
y a
= ·sin(
While the statistical data list is on the display, perform the following key operation.
1 (CALC)6 ( )5 (Sin)
6 (DRAW)
Make sure that the angle unit setting of the calculator is Rad (radians) when drawing a
sinusoidal regression graph. The sinusoidal regression calculation is performed using
radians, so the graph will cannot be drawn correctly if the angle unit setting is something
else.
• Certain types of data may take a long time to calculate. This does not indicate malfunction.
y
as a proportion of the power of
y a x b
= × , so if we take the logarithm of both sides we get In
x
, Y = In
b
X.
bx c d
+ ) +
6-3-9
x
. The standard power
y a
, and A = In , the formula corresponds to
20070201
y
=