Casio fx-3650P is a programmable scientific calculator manufactured by Casio Computer Co., Ltd. It can store 12 digits for the mantissa and 2 digits for the exponent together with the expression each time when the "EXE" button is pressed. Also, the calculator can use the previous result to do calculations by pressing "Ans".
This mode is for statistical calculation and can be divided further into:
Linear regression: y=A+Bx
Logarithmic regression: y=A+B*ln x
Exponential regression: ln y=ln A+Bx
Power regression: y=A+xB
Inverse regression: y=A+B/x
Quadratic regression: y=A+Bx+Cx2
For some input ordered pairs, one of the below can be calculated. Σx2, Σx, n, Σy2, Σy, Σxy,, xσn, xσn-1,, yσn, yσn-1, Regression coefficient A, Regression coefficient B, Correlation coefficient r,,, Σx3, Σx2y, Σx4, Regression coefficient C, 1and 2
Program
The calculator can hold up to 4 programs with a total capacity of 360 bt. Program commands:
? - Operator input command, used when user's input is required. Usually used with →
→ - Assign to variable command, to assign the value before it to the variable after it. Always used as →.
: - Multi-statement separator, separate program statements
Goto - Unconditional jump, jump to label, otherwise Lbl
Lbl - Label, jump destination
Conditional jumps
Conditional jumps should be used in the syntax:
conditionstatement 1:statement 2
When condition is true, statement 1 is executed, then statement 2 is executed. If condition is false, statement 1 is skipped and statement 2 is executed. E.g.: ...A=0A+1→B:C+5→D:... If A=0, both A+1→B and C+5→D is executed. If A≠0, only C+5→D is executed.
Unconditional jumps
Unconditional jumps use Goto and Lbl to operate. When Goto n is executed, the program will jump to Lbl n. Loops can be created with unconditional jumps.
System check
The calculator will perform a system check when shift, 7 and ON are pressed together. The system check has 3 parts. Part 1: light check - All lights will be on when the system check is initiated, press shift then all lights will be off. Press shift to proceed. The next 2 screens have similar functions. Part 2: display check - The dot matrix screen will display "24 PRG13" and the LCD screen will display "0000000000 00". Press shift to proceed. Then the display becomes "BBBBBBBBBB" and "1111111111 11". Then "CCCCCCCCCC" and "222222222 22" and so on up till "JJJJJJJJJJ""9999999999 99". Press shift to proceed to part 3. Part 3: key check - Press shift, the LCD will display 1. Press alpha, up, down, left, right in order. The display will increase by 1 each time you press a button. Next, press MODE, prog, dx, x−1, x3, and so on up till Ans. When EXE is pressed, the display becomes "24 OK""13". Press ON to end the system check.
