User manual CASIO FX-100W

[. . . ] Keep this manual handy for later reference. Caution This symbol is used to indicate information that can result in personal injury or material damage if ignored. Batteries · After removing the batteries from the calculator, put them in a safe place where there is no danger of them getting into the hands of small children and accidently swallowed. · Never charge batteries, try to take batteries apart, or allow batteries to become shorted. Never expose batteries to direct heat or dispose of them by incineration. · Misuse of batteries can cause them to leak acid that can cause damage to nearby items and creates the possibility of fire and personal injury. [. . . ] · Press [ to delete the number or function at the current cursor position. Inputting something while the insert cursor is on the display inserts the input at the insert cursor position. · Press e, r, A K, or = returns to the normal cursor from the insert cursor. k Replay Function · Pressing r or e recalls the last calculation you performed. You can then make any changes you want in the calculation and re-execute it. · Pressing t does not clear Replay memory, so you can recall the last calculation even after you press t. · Replay memory is cleared whenever you start a new calculation, change to another mode, or turn off power. 8 k Error Locator · Pressing r or e after an error occurs displays the calculation with the cursor positioned at the location where the error occurred. k Exponential Display Formats This calculator can display up to 10 digits. In the case of decimal values, you can select between two formats that determine at what point exponential notation is used. Press F F F F 3 1 (or 2) to select NORM 1 or NORM 2. · NORM 1 With NORM 1, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than two decimal places. · NORM 2 With NORM 2, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than nine decimal places. · All of the examples in this manual show calculation results using the NORM 1 format. k Answer Memory · Whenever you press = after inputting values or an expression, the calculated result is automatically stored in Answer Memory. · Answer Memory can store up to 12 digits for the mantissa and two digits for the exponent. · Answer Memory contents are not changed if the operation performed by any of the above key operations results in an error. 9 Basic Calculations · Use the COMP mode for basic calculations. · The above results can be obtained in any order, and not necessarily that shown above. · To delete data you have just input, press A U. k Probability Distribution Calculations · Press A D to produce the screen shown below. P ( Q ( R ( t 12 3 4 · Input a value from 1 to 4 to select the probability distribution calculation you want to perform. P(t) Q(t) R(t) 19 · Example : Using the x-data values input in the example on page 20, determine the normalized variate (t) for x = 53 and normal probability distribution P(t). 53 A D 4 (t) = -0. 284747398 A D 1 ( P( ) -0. 28 F = 0. 38974 k Regression Calculations (REG Mode) · Press F F 2 to enter the REG mode and then select one of the following regression types. 1: Linear regression 2: Logarithmic regression 3: Exponential regression r 1: Power regression r 2: Inverse regression r 3: Quadratic regression · Data input always starts with A m = to clear statistical memory. · The values produced by a regression calculation depend on the values input, and results can be recalled using the key operations shown in the table below. 0 G x 2 A N 0 H x A l 0k n Ad 0 h y 2 A c 0 n y A q 0 o xy A w 0 M x 3 A e 0 x x2y A J 0 y x 4 A O AM o Ab A A xn · Linear Regression xn-1 p yn yn-1 Regression coefficient A Regression coefficient B Regression coefficient C Correlation coefficient r m n The regression formula for linear regression is: y A Bx. 20 · Example: Atmospheric Pressure vs. Temperature Temperature Atmospheric Pressure 10°C 15°C 20°C 25°C 30°C 1003 hPa 1005 hPa 1010 hPa 1011 hPa 1014 hPa Perform linear regression to determine the regression formula terms and correlation coefficient for the data nearby. Next, use the regression formula to estimate atmospheric pressure at 18°C and temperature at 1000 hPa. Enter REG Mode (Linear Regression) qq21 A m = (Memory Clear) 10 P 1003 S 15 P 1005 S 20 P 1010 S 25 P 1011 S 30 P 1014 S (Regression Coefficient A) (Regression Coefficient B) (Correlation Coefficient r) (Atmospheric Pressure at 18°C) (Temperature at 1000 hPa) 30. 00 REG A q= A w= A J= 18 A b 1000 A O 997. 400 0. 5600 0. 98260736800 1007. 4800 4. 64285714300 · Quadratic Regression · The regression formula for quadratic regression is: y = A + Bx +Cx2. <x-data> P <y-data> S · Example: xi 29 50 74 103 118 yi 1. 6 23. 5 38. 0 46. 4 48. 0 Perform quadratic regression to determine the regression formula terms and correlation coefficient for the data nearby. Next, use the regression fory mula to estimate the values for ^ (esx timated value of y) for xi = 16 and ^ (estimated value of x) for yi = 20. 21 Enter REG mode (Quadratic regression) FF2r3 A m= 29 P 1. 6 S 50 P 23. 5 S 74 P 38. 0 S103 P 46. 4 S 118 P 48. 0 S (Regression Coefficient A) (Regression Coefficient B) (Regression Coefficient C) (^ when xi = 16) y (^ 1 when yi = 20) x (^ 2 when yi = 20) x 118. REG A q = -35. 59856934 Aw= 1. 495939413 A e = -6. 71629667-03 16 A b -13. 38291067 20 A O 47. 14556728 175. 5872105 AO Data Input Precautions · S S inputs the same data twice. · You can also input multiple entries of the same data using A G. [. . . ] The calculator performs a self-check operation and deletes all data stored in memory if any abnormality is detected. Make sure you always keep written copies of all important data. k Error Messages The calculator is locked up while an error message is on the display. Press t to clear the error, or press e or r to display the calculation and correct the problem. See "Error Locator" on page 9 for details. Ma ERROR · Cause · Calculation result is outside the allowable calculation range. [. . . ]