Texas Instruments TI-83 PLUS - Manual (Page 322)

TI-83 Plus Statistics 319
11. Press y d ¢ y e ¢ . Press  ~
1 to
display the
VARS Y . VARS FUNCTION
secondary
menu, and then press 1 to select 1:Y 1
. L 1
, L 2
,
and Y 1
are pasted to the home screen as
arguments to LinReg(ax+b) .
12. Press Í to execute LinReg(ax+b) . The linear
regression for the data in L 1
and L 2
is calculated.
Values for a and b are displayed on the home
screen. The linear regression equation is stored
in
Y 1
. Residuals are calculated and stored
automatically in the list name RESID , which
becomes an item on the
LIST NAMES
menu.
13. Press s . The regression line and the
scatter plot are displayed.
The regression line appears to fit the central portion of the scatter plot
well. However, a residual plot may provide more information about this
fit.