Texas Instruments TI-83 Manual Book page 223

Diagnostics
Display Mode
When you execute some regression models, the TI-83
computes and stores diagnostics values for
coefficient) and
r
(coefficient of determination).
2
and are computed and stored for these regression
r r
models.
LinReg(ax+b)
LinReg(a+bx)
2
is computed and stored for these regression models.
R
QuadReg
2
The and that are computed for
r r
are based on the linearly transformed data. For
PwrReg
example, for
ExpReg
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
or
DiagnosticOn DiagnosticOff
is in the
CATALOG
DiagnosticOn
Note: To set
screen, press y [
CATALOG
mode you want. The instruction is pasted to the home screen. Press
Í to set the mode.
When
DiagnosticOn
the results when you execute a regression model.
When
DiagnosticOff
with the results when you execute a regression model.
2
(coefficient of determination) or for
LnReg
ExpReg
CubicReg
(y=ab^x), and
r
instruction. Each instruction
(Chapter 15).
DiagnosticOff
or
], and then select the instruction for the
is set, diagnostics are displayed with
is set, diagnostics are not displayed
(correlation
r
PwrReg
QuartReg
, , and
LnReg ExpReg
2
are computed on
r
from the home
Statistics 12-23
2
R