Casio FX-9750GII-SC User Guide - Page 150
Selecting the Regression Type, Displaying Regression Calculation Results
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Example Input the two sets of data shown below and plot the data on a scatter diagram. Next, perform logarithmic regression on the data to display the regression parameters, and then draw the corresponding regression graph. 0.5, 1.2, 2.4, 4.0, 5.2 (xList) -2.1, 0.3, 1.5, 2.0, 2.4 (yList) K STAT ? DU@ AUA CUCUD AUC A @U? BU@ DUAUA CU (GRPH)(SET)A(Scat))(GPH1) (CALC)(E)(Log) (DRAW) • You can perform trace on a regression graph. You cannot perform trace scroll. • Input a positive integer for frequency data. Other types of values (decimals, etc.) cause an error. I Selecting the Regression Type After you graph paired-variable statistical data, you can use the function menu at the bottom of the display to select from a variety of different types of regression. • {ax+b}/{a+bx}/{Med}/{X^2}/{X^3}/{X^4}/{Log}/{ae^bx}/{ab^x}/{Pwr}/{Sin}/{Lgst} ... {linear regression (ax+b form)}/{linear regression (a+bx form)}/{Med-Med}/{quadratic regression}/{cubic regression}/{quartic regression}/{logarithmic regression}/{exponential regression (aebx form)}/{exponential regression (abx form)}/{power regression}/ {sinusoidal regression}/{logistic regression} calculation and graphing • {2VAR}... {paired-variable statistical results} I Displaying Regression Calculation Results Whenever you perform a regression calculation, the regression formula parameter (such as a and b in the linear regression y = ax + b) calculation results appear on the display. You can use these to obtain statistical calculation results. Regression parameters are calculated as soon as you press a function key to select a regression type, while a graph is on the display. The following parameters are used by linear regression, logarithmic regression, exponential regression, and power regression. r correlation coefficient r2 coefficient of determination MSe......... mean square error 6-10