Texas Instruments TI-84 Plus Guide Book

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

Texas Instruments TI-84 Plus Specifications

General

Battery type	AAA
Power source	Battery
Number of batteries supported	4
Type	Graphing
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black
USB port	Yes
USB 2.0 ports quantity	1
Digits	- digits
Display number of lines	8 lines
Display number of characters	16
RAM capacity	0.024 MB
ROM capacity	0.480 MB
Storage media type	-