Chapter 12: Statistics 197
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 y N, 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.
QuadReg CubicReg QuartReg
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