HP 33S - Page 276

16–18 Statistics Programs
File name 33s-E-Manual-1008-Publication(1st).doc Page : 386
Printed Date : 2003/10/8 Size : 13.7 x 21.2 cm
Program Listing:
Program Lines:
(In RPN mode)
Description
  
Start grouped standard deviation program.
 
Clears statistics registers (28 through 33).
 
  
Clears the count N.
Checksum and length: EF85 24
  
Input statistical data points.
  
Stores data point in X.
  
Stores data–point frequency in F.
 
Enters increment for N.
  
Recalls data–point frequency f
i
.
Checksum and length: 6889 27
  
Accumulate summations.
 
  
Stores index for register 28.
 


 
Updates
∑
i
f
in register 28.
  
ii
fx
 
  
Stores index for register 29.
 


 
Updates
∑
ii
fx
in register 29.
  
fx
i
2
 
  
Stores index for register 31.
 


 
Updates
∑
ii
fx
2
in register 31.
 
Gets 1 (or –1).
  
Increments (or decrements) N.
  
  
Displays current number of data pairs.