Texas Instruments TI-84 Plus Manual Book page 283

25. Press Í to calculate the power regression.
Values for and
a
screen. The power regression equation is stored
in . Residuals are calculated and stored
Y1
automatically in the list name
26. Press s. The regression line and the scatter
plot are displayed.
The new function y=.192x
examine a residual plot.
27. Press o to display the Y= editor.
Press | Í to deselect
Press } Í to turn off plot 1. Press ~ Í to
turn on plot 2.
Step 19 defined plot 2 to plot residuals
Note:
( ) versus string length (
RESID
28. Press q
9
menu. The window variables are adjusted
automatically, and plot 2 is displayed. This is a
scatter plot of the residuals.
Chapter 12: Statistics
are displayed on the home
b
RESID
.522
appears to fit the data well. To get more information,
.
Y1
).
L1
to select
9:ZoomStat
.
from the
ZOOM
280