Operation Manual

Chapter 12: Statistics 203
r
and r
2
are computed and stored for these regression models.
R
2
is computed and stored for these regression models.
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).
• To turn diagnostics on or off from the mode screen, select On or Off for StatDiagnostics. The
default is Off.
• To set DiagnosticOn or DiagnosticOff from the home screen, press yN, and then select
the instruction for the mode you want. The instruction is pasted to the home screen. Press Í to
set the mode.
When DiagnosticOn is set, diagnostics are displayed with the results when you execute a regression
model.
When
DiagnosticOff is set, diagnostics are not displayed with the results when you execute a
regression model.
LinReg(ax+b)
LinReg(a+bx)
LnReg
ExpReg
PwrReg
QuadReg CubicReg QuartReg
MathPrint™
Classic