HP 32SII - Manual (Page 282)

16–18 Statistics Programs
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
0.8 f %/) Stores 0.8 (100 percent minus 20
percent) in Q(X) and calculates X.
Grouped Standard Deviation
The standard deviation of grouped data, S
xy
, is the standard deviation of
data points x
1
, x
2
, ... , x
n
, occurring at positive integer frequencies f1, f2, ... ,
fn.
∑
∑
∑
∑
−
−
=
1 ) (
) ( 2
2
i
i
i i
i
xg f
f
f x
x
S
This program allows you to input data, correct entries, and calculate the
standard deviation and weighted mean of the grouped data.
Program Lines: Description
   Start grouped standard deviation program.
 ; Clears statistics registers (28 through 33).


 !  Clears the count N.
Checksum and length: 104F 006.0

   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: 4060 007.5

   Accumulate summations.

  

 ! L Stores index for register 28.

 ¶