User's Manual
12-6 Statistics
8312STAT.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:42 PM Printed: 02/19/01 1:37
PM Page 6 of 38
18. Press
y
[
STAT PLOT
] 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
[
L1
] 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.
20. Press
o
to display the
Y=
editor.
Press
|
to move the cursor onto the
= sign, and then press
Í
to deselect
Y
1
. Press
}
Í
to turn off plot 1.
21. Press
q
9 to select 9:ZoomStat from
the
ZOOM
menu. The window variables
are adjusted automatically, and plot 2 is
displayed. This is a scatter plot of the
residuals.
Notice the pattern of the residuals: a group of negative residuals, then a group
of positive residuals, and then another group of negative residuals.