Texas Instruments 83PL/CLM/1L1/V - 83 Plus Calc, Manual Book

Page: 357 / 827

TI-83 Plus Statistics 354
Diagnostics Display Mode
When you execute some regression models, the TI-83 Plus computes
and stores diagnostics values for
r
(correlation coefficient) and
r
2
(coefficient of determination) or for
R
2
(coefficient of determination).
r
and
r
2
are computed and stored for these regression models.
LinReg(ax+b) LnReg PwrReg
LinReg(a+bx) ExpReg
R
2
is computed and stored for these regression models.
QuadReg CubicReg QuartReg
The
r
and
r
2
that are computed for
LnReg
,
ExpReg
, and
PwrReg
are
based on the linearly transformed data. For example, for
ExpReg
(y=ab^x),
r
and
r
2
are computed on ln y=ln a+x(ln b).
By default, these values are not displayed with the results of a
regression model when you execute it. However, you can set the
diagnostics display mode by executing the
DiagnosticOn
or
DiagnosticOff
instruction. Each instruction is in the
CATALOG
(Chapter 15).