Victor Technology V12 Manual Do Utilizador

¾

  Enter the new y value 

¾

 Touch 

 

r 

 x, r  

 
The correlation coefficient, r, can be calculated by touching the x↔y key after 
calculating the estimate. 
 
 
Example 
Using the children’s height (y) and weight (x) values from above, estimate the 
height (y) of a child weighing 64 pounds (x) and determine the correlation 
coefficient.  Note:  Do not clear the registers after the prior example. 
 

ENTRIES DISPLAY 

64  r   y, r 

43.34 
Displays the estimated height of a child weighting 
64 pounds.  

 

 x↔y 

 

0.77 
Displays the correlation coefficient (r)  of the data 
pairs. 

 
 
 
Weighted Mean Values 
A set of numbers and their weighted mean may be determined if you know the 
weights of the items to be calculated.  To do this: 

¾

 Touch 

 

b 

clear  

∑   

¾

  Enter value of item and touch  ENTER  

¾

  Enter items’ weight and touch  

∑+  

¾

  Repeat until all values are entered, following the item  ENTER  weight  

∑+  formula 

¾

 Touch 

 

r 

 x w   to calculate weighted mean of all values 

 
Example 
Over a 6-month period, you buy bricks on many occasions to lay a path through 
your garden. 

•  First month:  150 bricks at $0.68 a brick 

•  Second month:  200 bricks at $0.43 a brick