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 r2
(coefficient of determination) or for R2 (coefficient of determination).
r and r2 are computed and stored for these regression models.
LinReg(ax+b) LnReg PwrReg
LinReg(a+bx) ExpReg
R2 is computed and stored for these regression models.
QuadReg CubicReg QuartReg
The r and r2 that are computed for LnReg, ExpReg, and PwrReg are
based on the linearly transformed data. For example, for ExpReg
(y=ab^x), r and r2 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).