Casio FX-9860GII-L-IH User Guide - Page 293
Quadratic/Cubic/Quartic Regression Graph, Quadratic regression
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6-3-7 Calculating and Graphing Paired-Variable Statistical Data k Quadratic/Cubic/Quartic Regression Graph A quadratic/cubic/quartic regression graph represents connection of the data points of a scatter diagram. It uses the method of least squares to draw a curve that passes close to as many data points as possible. The formula that represents this is quadratic/cubic/quartic regression. Ex. Quadratic regression 1(CALC)4(X^2) 6(DRAW) Quadratic regression Model formula ..... y = ax2 + bx + c a regression second coefficient b regression first coefficient c regression constant term (y-intercept) r2 coefficient of determination MSe ........ mean square error Cubic regression Model formula ..... y = ax3 + bx2 + cx + d a regression third coefficient b regression second coefficient c regression first coefficient d regression constant term (y-intercept) r2 coefficient of determination MSe ........ mean square error Quartic regression Model formula ..... y = ax4 + bx3 + cx2 + dx + e a regression fourth coefficient b regression third coefficient c regression second coefficient d regression first coefficient e regression constant term (y-intercept) r2 coefficient of determination MSe ........ mean square error 20050401