Texas Instruments TI-80 Manual Book page 133

Plot the residuals, and predict how many buildings of 12 or more stories there
are in a city with a population of 300 thousand.
27. Press ( 6 ¸ to turn off
28. Press ), and change the Window variable
values to best show the residuals. Use the minimum
and maximum values of
10.74019608) as guidelines for setting
.
YMAX
29. Press , to plot the residuals.
marks each residual value.
30. Press y
ã
QUIT
screen. Press y
press £
300
The value of
X =300 (which represents 300 thousand city
population) is shown. Remember to round the
number mentally to an integer (13) to represent
whole buildings.
Y1
L4 (M10.31862745 and
M to return to a clear Home
ä
ã ä 1
to select
Y-VARS
d Í.
(the linear regression equation) for
Y1
.
YMIN and
Y1 . Then
Statistics 9-7