Casio CFX-9800G-w Owners Manual - Page 72
Ibeimeirslimi
UPC - 079767128685
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•Performing Paired-Variable Calculations After inputting the data, select the type of operation you want from the function menu at the bottom of the REG Mode set up display. Press one of the following function keys to display a menu of available operations. Fa (DEV) Statistical menu E(E) Sum data menu E(REG) Regression/estimated value menu Each of these menus is described in detail below. • Statistidal Menu El(DEV) E(X) EI(xan) E(xan- .0 MX) FS (ron) Fa (ran-1) Ionectantrinall E .E 0 ' C3 EE Mean of x-data Population standard deviation of x-data Sample standard deviation of x'clata Mean of y-data - Population standard deviation of y-data Sample standard deviation of y-data • Sum Data Menu ERE) EKE x2) E(Ex) E(n) E(EY2) E(EY) Fa (Exy) IBEEEIEMI0EIRSLI5MI:5 Sum of squares of x-data Sum of x-data Number of items. Sum of squares of y-data Sum of y-data" Sum of products of x-data and y-data • Regression/Estimated Value Menu Fe (REG) Constant term A Regression coefficient B Correlation coefficient r Estimated value of r Estimated value of y -108- Important Anytime you delete, insert, or otherwise edit statistical data, be sure to press Effil and then E(CAL) to re-calculatethe statistical results before inputting new data or performing any other calculation. You should also press JIB followed byE(CAL) after you delete the statistical data memory using Scl ( EE(ScI)E). 5.3 Examples of Statistical Calculations The following are the formulas used by the unit to calculate standard deviation and mean. •Standard Deviation j xan = EI-I(X/ - -7)2, = ll - E - (Ex)2/n n Using all data from a finite popuration to determine the standard deviation for the population E1(x, -.V)2 xan 1 = j 1- n-1 . Ex2 - (Ex)2In n-1 Using sample data from a population to determine the standard deviation for the population *Mean Ex = Ez Example , Data 55,54, 51, 55, 53, 53, 54, 52 _ Operation I c(ElcEierTsrD:E7m 5(5oNs2,c4y0EigNh(IDT).0 Display 515(DT)55E(DT) 53CI(DT)E(DT)54E(DT) *You can press the function keys to obtain results In any sequence. (Standard deviation an) Po (Standard deviation amt) Fa i)g (Mean it Egi)g (Number of data n) Fa (E) (Sum total Ex) mEx)g (Sum of squares Ex2)E(sx2)g -109- 52 1.316956719 1.407885953 53.375 8 427 22805