User manual CITIZEN CX-126II

[. . . ] [ 2ndF ] [ XY ] Register Exchange Key Press [ 2ndF ] [ XY ] to exchange the displayed value (X­register) with the contents of the working register (Y­register). [ 2ndF ] [ FIX ] Decimal Point Set Key Use to set the number of digits displayed after the decimal point in either final or intermediate results. The calculator continues to use its full range for internal calculations and only rounds the number in the display. 555555556 Note : [ 2ndF ] [ FIX ] is inactive immediately after and during numerical input. [. . . ] [ DRG ] Angle unit conversion key Press to change the angle unit as DEG (Degrees), RAD (Radian), or GRAD (Gradient). To change from decimal notation to sexagesimal notation, enter the number in decimal form and then press [ 2ndF ] [ ]. ] [ x y ] Power Key Press any number [ x ], [ x y ], any number [ y ], and [ = ] raise x to the y power. [ a b ], [ 2ndF ] [ d ] Fraction key e c Pressing by [ a b ] can enter a fraction or convert a fraction to a Pressing by [ 2ndF ] [ d ] can convert a mixed e number to an improper fraction and vice versa. [ 2ndF ] [ [X] ]Specify Variable Key Lets you have the calculator wait for an entry during a program. [ 2ndF ] [ HALT ]Temporarily Halt Calculation Key Temporarily halts a program so you can view the intermediate results or interrupt calculation. [ DATA ], [ DEL ] Data Entry and Delete Key In the STAT mode, enter data by pressing the desired numbers, then [ DATA ]. If you enter incorrect data and do not notice your mistake until you press [ DATA ], enter the same incorrect data and then press [ DEL ] to delete that incorrect data. Indicators showed on the display to indicate you the current status of the calculator. : Appears when you press [SHIFT] [[X]] in the program learn mode and when program execution halts to let you enter a variable. Before performing the following calculation, check to see that your calculator is fixed at 2 decimal disaply format. ] key after the [ = ] key or a fraction Performed with a decimal, the answer is displayed as a decimal. Press [ 2ndF ] [ CAD ] to clear statistical memory before you start a new calculation. Instead of entering directly each data, when often several item of data have the same value, you can enter the value and the number of occurrences. ) : Enter the following data to calculate n, x, x 2, x , n­1, n, where data 1 = 2, data 2~4 = 5, data 5~6 = 9 [ 2ndF ] [ SD ] [ 2ndF ] [ CAD ] 2 [ DATA ] 5 [ DATA ] 5 [ DATA ] 5 [ DATA ] 9 [ DATA ] 9 [ DATA ] ­ or ­ 2 [ DATA ] 5 [ x ] 3 [ DATA ] 9 [ x ] 2 [ DATA ] [n] [ 2ndF ] [x ] [ 2ndF ] [x ] [x] [n­1] [ 2ndF ] [n] Note: The sample standard deviation n­1 is defined as : The population standard deviation n is defined as : The arithmetical mean x is defined as : x n With your programmable scientific calculator, complex repeated calculations are no longer time­consuming chores. All you have to do is tell the calculator what you want to do in a way it can understand (in other word, program it). These "steps" can be either steps (like mathematical functions) or characters (like numbers). Now enter your procedure as if you were just going to calcualte it once exceptpress [ 2ndF ] [ [X] ] before entering variable data. Note : If you press [ 2ndF ] [ [X] ] then [] or a number, and then [ EXP ], [ +/­ ], [ ) ] or [ CE ], both the number and the first function following the number are treated as one variablethey are not written into the program as steps. Just enter each variable in the order in which it occurs in the formula and press [ RUN ] after each variable. [. . . ] Just enter each variable in the order in which it occurs in the formula and press [ RUN ] after each variable. Stored programs are automatically erased when you press [ 2ndF ] [ PGM ]. So, unless you want to enter a new program, do not select the program mode. You can program your calculator to give you interim values in your formula also. [. . . ]