User manual CITIZEN CT422

[. . . ] Entries begin on the left ; those with more than 11 digits scroll to the left. Press [ 2nd ] [ ] or [ 2nd ] [ ] to move the cursor immediately to the beginning or end of the entry. Result line It displays a result of up to 10 digits, as well as a decimal, a negative sign, a " x10 " indicator, and a 2-digits positive or negative exponent. results that exceed the digit limit are displayed in scientific notation. [. . . ] After execution is complete, pressing [ ] or [ ] key will display the operation from the beginning or the end. After execution is complete or during entering, you can press either [ ] or [ ] to display previous input steps and edit values or commands for subsequent execution. (Note) : The replay function isn't cleared even when [ CL ] is pressed or power is turned off, so contents can be recalled even after [ CL ] is pressed. However, replay function is cleared when mode or operation is switched. When a mathematically illegal calculation is performed, error position display function will tell you with the cursor where the error is. You can also clear an error by pressing [ CL ] and then re-entered the values and expression from the beginning. The calculator has ten memory variables for repeated use : A, B, C, X, Y, M, X1, X2, PROG1 and PROG2. You can store a real number in variables A, B, C, X, Y, M, X1, X2 and an expression in PROG1 and PROG2. (Note) : Besides pressing [ SAVE ] key to store a value, you can also assign values to memory variable M by [ M+ ] or [ 2nd ] [ M­ ]. However, anything currently stored in variable M will be deleted and replaced by the newly assigned value. Each calculation is performed in the following order of precedence : 1) 2) Expression inside parentheses. Even if calculations are concluded with the [ ] key, the result obtained can be used for further calculation. Once a numeric value ] is pressed, the or numeric expression is entered and [ result is stored by this function. (Note) : Even if execution of a calculation results in an error, however, Answer memory retains its current value. The calculator can calculate common and natural logarithms and x anti-logarithms using [ log ], [ ln ], [ 2nd ] [ 10 ], and [ 2nd ] x [ e ]. To enter a mixed number, enter the integer part, press [ a /c ], b enter the numerator, press [ a /c ], and enter the denominator ; To b enter an improper fraction, enter the numerator, press [ a /c ], and enter the denominator. During a fraction calculation, if the figure is reducible, a figure is reduced to the lowest terms after pressing a function command ] ) or the [ ] key. [ F D ] and [ Calculations containing both fractions and decimals are calculated in decimal format. The relation among the three angle units is : 180°=rad = 200 grad Angle conversations ( See Example 32. The units you can select are ° (degrees), (minutes), (seconds), r (radians), g (gradians) or DMS (Degrees-Minutes-Seconds). (Note) : When using those keys, make sure the calculator is set for the angle unit you want. (Note) : When using those keys, make sure the calculator is set for the angle unit you want. [. . . ] (Note) : When calculating process capability in 2­VAR mode, the x n and y n are independent with each other. Press [ STATVAR ] and scroll through the statistical results ] or [ menu by [ ] to find out probability distribution variables you want. Test value Represent the cumulative fraction of the standard normal distribution that is less than the value t Represent the cumulative fraction of the standard normal distribution that lies between the value t and 0. Based on the datasets in 2­VAR mode, press [ STATVAR ] and scroll through the statistical results menu by [ ] or [ ] to find out a, b, or r. [. . . ]