Texas Instruments TI-83 Manual Book page 205

The regression line appears to fit the central portion of the scatter plot well.
However, a residual plot may provide more information about this fit.
14. Press ...
1
list editor is displayed.
Press ~ and } to move the cursor onto
.
L
3
Press y [
INS
displayed in column
shift right one column. The
prompt is displayed in the entry line, and
alpha-lock is on.
15. Press y [
LIST
menu.
NAMES
If necessary, press † to move the cursor
onto the list name
16. Press Í to select
to the stat list editor's
17. Press Í.
of the stat list editor.
Press † repeatedly to examine the
residuals.
Notice that the first three residuals are negative. They correspond to the
shortest pendulum string lengths in
three of the last four are negative. The latter correspond to the longer string
lengths in . Plotting the residuals will show this pattern more clearly.
L
1
to select . The stat
1:Edit
]. An unnamed column is
; , ,
3 L L L
3 4
Name=
] to display the
.
RESID
and paste it
RESID
prompt.
Name=
is stored in column
RESID
, and
L
5 6
LIST
3
. The next five residuals are positive, and
L
1
Statistics 12-5