Texas Instruments TI-84 - page 307

Chapter 12: Statistics 304
Note: For the regression equation, you can use the fixed-decimal mode setting to control
the number of digits stored after the decimal point (Chapter1). However, limiting the
number of digits to a small number could affect the accuracy of the fit.
Diagnostics Display Mode
Diagnostics Display ModeDiagnostics Display Mode
Diagnostics Display Mode
When you execute some regression models, the TI-84 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.
R2 is computed and stored for these regression models.
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).
LinReg(ax+b)
LinReg(a+bx) LnReg ExpReg PwrReg
QuadReg CubicReg QuartReg