Texas Instruments TI-83 Manual Book page 208

The new function y=.192x
information, examine a residual plot.
27. Press o to display the
Press | Í to deselect
Press } Í to turn off plot 1. Press
~ Í to turn on plot 2.
Note: Step 19 defined plot 2 to plot residuals (
versus string length (
28. Press q
9
the menu. The window variables
ZOOM
are adjusted automatically, and plot 2 is
displayed. This is a scatter plot of the
residuals.
The new residual plot shows that the residuals are random in sign, with the
residuals increasing in magnitude as the string length increases.
To see the magnitudes of the residuals, continue with these steps.
29. Press r.
Press ~ and | to trace the data.
Observe the values for
With this model, the largest positive
residual is about 0.041 and the smallest
negative residual is about L0.027. All
other residuals are less than 0.02 in
magnitude.
12-8 Statistics
.522
appears to fit the data well. To get more
editor.
Y=
.
Y
1
L
).
1
to select
9:ZoomStat
at each point.
Y
RESID
)
from