Texas Instruments TI86 User Manual - Page 204

192 Chapter 14: Statistics PRegC is the only statistical result variable calculated for a polynomial regression. One- and two-variable statistical functions share the result variables. The statistical variables are calculated and stored as shown in the table on the next page. You can use ALPHA keys, alpha keys, and the CHAR GREEK menu to enter some result variables. The result for a polynomial regression, sinusoidal regression, or logistic regression is stored in PRegC (polynomialàregression coefficients). PRegC is a list containing the coefficients for an equation. For example, for P3Reg, the result PRegC={3 5 L2 7} would represent y=3x3+5x2N2x+7. Results of a Statistical Analysis When you perform a statistical analysis, the calculated results are stored in the result variables and the data from the lists used in the analysis are stored to xStat, yStat, and fStat. If you edit a list or change the type of analysis, all statistical variables are cleared. The STAT VARS (Statistical Variables) Menu - š * CALC EDIT PLOT DRAW VARS v sx Sx w sy 4 Sy Gx Gx2 Gy Gy2 4 Gxy RegEq corr a b 4 n minX maxX minY maxY 4 Med PRegC Qrtl1 Qrtl3 tolMe To paste a result variable to the cursor location, either select the variable from the STAT VARS menu or select the variable from the VARS STAT selection screen. ♦ To use a result variable in an expression, paste it to the appropriate cursor location. ♦ To display the value of a result variable, paste it to the home screen and press b. ♦ To store results to another variable after a calculation, paste the result variable to the home screen, press X, enter a new variable, and then press b.