Casio FX-9750GII-SC User Guide - Page 157
Estimated Value Calculation for Regression Graphs, and then press
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• Linear Regression (ax + b MSe = 1 n - 2 n i=1 (yi - (axi + b))2 (a + bx MSe = 1 n - 2 n (yi - (a + bxi))2 i=1 • Quadratic Regression MSe = 1 n - 3 n (yi - (axi2+ bxi + c))2 i=1 • Cubic Regression MSe = 1 n - 4 n i=1 (yi - (axi3+ bxi2+ cxi + d ))2 • Quartic Regression MSe = 1 n - 5 n (yi - (axi4+ bxi3 + cxi2 + dxi + e))2 i=1 • Logarithmic Regression MSe = 1 n - 2 n i=1 (yi - (a + b ln xi ))2 • Exponential Repression (a·ebx) .......MSe = 1 n - 2 n i=1 (ln yi - (ln a + bxi ))2 (a·bx)........MSe = 1 n - 2 n (ln yi - (ln a + (ln b) · xi ))2 i=1 • Power Regression MSe = 1 n - 2 n (ln yi - (ln a + b ln xi ))2 i=1 • Sin Regression MSe = 1 n - 2 n i=1 (yi - (a sin (bxi + c) + d ))2 • Logistic Regression MSe = 1 n - 2 n i=1 yi - 1 C + ae-bxi 2 S Estimated Value Calculation for Regression Graphs The STAT mode also includes a Y-CAL function that uses regression to calculate the estimated y-value for a particular x-value after graphing a paired-variable statistical regression. The following is the general procedure for using the Y-CAL function. 1. After drawing a regression graph, press (G-SLV)(Y-CAL) to enter the graph selection mode, and then press U. If there are multiple graphs on the display, use D and A to select the graph you want, and then press U. • This causes an x-value input dialog box to appear. 2. Input the value you want for x and then press U. • This causes the coordinates for x and y to appear at the bottom of the display, and moves the pointer to the corresponding point on the graph. 6-17