Texas Instruments TI-83 PLUS - Manual (Page 324)

TI-83 Plus Statistics 321
17. Press Í . RESID is stored in column 3 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
L 1
. The next five residuals are
positive, and three of the last four are negative. The latter correspond to
the longer string lengths in
L 1
. Plotting the residuals will show this pattern
more clearly.
18. Press y ,
2 to select 2:Plot2 from the
STAT PLOTS
menu. The stat plot editor is
displayed for plot 2.
19. Press Í to select On , which turns on plot 2.
Press † Í to select " (scatter plot). Press
† y d to specify Xlist:L 1
for plot 2. Press †
[
R
] [
E
] [
S
] [
I
] [
D
] (alpha-lock is on) to specify
Ylist:RESID for plot 2. Press † Í to select
›
as the mark for each data point on the
scatter plot.