138
Chapter 8: Statistics & Regression Calculations
• There are residuals between regression curves and actual
values.
• The residual list stores these residuals automatically.
• The
resid
list can be found in
B REGEQN
of the STAT VARS
menu (
z
H
E
B
8
).
• Use the following key operation to recall the residual list from
the calculation screen.
#
C
z
H
E
B
8
• Press
E
to display the residual list on-screen.
• To show the residual list in the form of a graph, first store as a
list, then follow the graphing operation.
*
resid
cannot be graphed when specified independently.
1. Press
#
C
S
D
0
4
(04 x
2
)
.
2. Press
(
@
1
,
@
2
,
z
A
E
A
1
)
.
If you enter Y1 as the last variable, the obtained formula will
automatically be set to the formula Y1.
3. Press
E
.
The regression formula and parameters will be displayed on
the screen.
4. Press
G
.
The calculator will draw the scatter diagram using the deter-
mined parameter values.
5. If there is a large difference between the regression curve and
plotted dots, change the regression curve and repeat the
above procedures.
About the
residual list
Drawing a
regression
curve using
quadratic
regression
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