HP 12c Owners Manual

  Section 6: Statistics Functions  81 
 
File name: hp 12c_users guide_English_HDPMBF12E44  Page: 81 of 209   
Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
Example:
 Compute the slope and intercept of the regression line in the preceding 
example. 
Keystrokes Display  
0gR 
15.55 y-intercept (A); projected value for x 
= 0. 
1 gR~d~- 
0.001 Slope of the line (B); indicates the 
change in the projected values 
caused by an incremental chan
ge in 
the x value. 
The equation that describes the...

82  Section 6: Statistics Functions 
 
File name: hp 12c_users guide_English_HDPMBF12E44  Page: 82 of 209   
Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
Keystrokes Display  
g 
1.19 Weighted mean cost per gallon. 
A procedure for calculating the standard deviation and standard error (as well as 
the mean) of weighted or grouped data is included in the hp 12c Solutions 
Handbook.  

 
83 
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Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
  Section 7 
Mathematics and 
Number-Alteration Functions 
The hp 12c provides several keys for mathematical functions and for altering, 
numbers. These functions are useful for specialized financial calculations as well as 
for general mathematics calculations. 
One-Number Functions 
Most of the mathematics functions require that only one number be in the 
calculator (that...

84  Section 7: Mathematics and Number-Alteration Functions 
 
 
File name: hp 12c_users guide_English_HDPMBF12E44  Page: 84 of 209   
Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
Fractional.
 Pressing gT
 replaces the number in the display by its fractional 
portion — that is, it replaces all digits to the left of the decimal point by 0. Like 
Ñ
, T
 changes the number inside the calculator as well as its displayed 
version. The original number can be recalled to the display by pressing gF...

  Section 7: Mathematics and Number-Alteration Functions  85 
 
File name: hp 12c_users guide_English_HDPMBF12E44  Page: 85 of 209   
Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
The Power Function 
Pressing q
 calculates a power of a number — that is, yx. Like the arithmetic 
function +
, q
 requires two numbers: 
1.  Key in the base number (which is designated by the y on the key). 
2. Press \ to separate the second number (the exponent) from the first (the 
base). 
3.  Key in the...

 
 
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Part II 
Programming 
  

 
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  Section 8 
Programming Basics 
Why Use Programs?
 
A program is simply a sequence of keystrokes that is stored in the calculator. 
Whenever you have to calculate with the same sequence of keystrokes several 
times, you can save a great deal of time by incorporating these keystrokes in a 
program. Instead of pressing all the keys each time, you press just one key to start...

  Section 8: Programming Basics  89 
 
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Keystrokes Display  
- 
150.00 Price less discount. 
5 
5. Handling charge. 
+ 
155.00 Net cost (price less discount plus 
handling charge). 
Next, set the calculator to Program mode and erase any program(s) already 
stored: 
Keystrokes Display  
fs 
00- Sets calculator to Program mode. 
fCLEARÎ 
00- Clears program(s). 
Finally, press the...

90  Section 8: Programming Basics 
 
 
File name: hp 12c_users guide_English_HDPMBF12E44  Page: 90 of 209   
Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
Example:
 Run the program created above to calculate the net cost of a typewriter 
listing for $625 and an executive chair listing for $159. 
Keystrokes Display  
fs 
155.00 Sets calculator to Run mode. Display 
shows number previously calculated. 
625 
625. Keys in price of typewriter. 
t 
473.75 Net cost of typewriter. 
159 
159. Keys in...