Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 203

The TI-84 Plus uses the formula below to compute RESID list elements. The next section
describes the variable
RESID = Ylistname N RegEQ(Xlistname)
Automatic Regression Equation
Each regression model has an optional argument,
such as . Upon execution, the regression equation is stored automatically to the specified Y=
Y1
variable and the Y= function is selected.
MathPrint™
Regardless of whether you specify a Y= variable for
stored to the TI-84 Plus variable
menu.
For the regression equation, you can use the fixed-decimal mode setting to control the
Note:
number of digits stored after the decimal point (Chapter 1). However, limiting the number of digits
to a small number could affect the accuracy of the fit.
Diagnostics Display Mode
When you execute some regression models, the TI-84 Plus computes and stores diagnostics
values for (correlation coefficient) and
r
determination). You can control whether these values are displayed by turning
or off on the mode screen.
2
and are computed and stored for these regression models.
r r
LinReg(ax+b)
LinReg(a+bx)
.
RegEQ
MathPrint™
Classic
, which is item
RegEQ
2
(coefficient of determination) or for
r
LnReg
ExpReg
, for which you can specify a Y= variable
regequ
MathPrint™
Classic
, the regression equation always is
regequ
on the
1 VARS Statistics EQ
PwrReg
Chapter 12: Statistics
secondary
2
(coefficient of
R
on
StatDiagnostics
196