HP 32SII User Manual
Page 285
Statistics
Programs
16–21
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
i
Index variable used to indirectly address the correct
statistics register.
Register 28
Summation
Σ
f
i
.
Register 29
Summation
Σ
x
i
f
i
.
Register 31
Summation
Σ
x
i2
f
i
.
Example:
Enter the following data and calculate the grouped standard deviation.
Group
1
2
3
4
5
6
x
i
5
8
13
15
22
37
f
i
17
26
37
43
73
115
Keys: Display:
Description:
W
S
%@
value
Prompts for the first x
i
.
5
f
@
value
Stores 5 in X; prompts for first f
i
.
17
f
/)
Stores 17 in F; displays the
counter.
f
%@)
Prompts for the second x
i
.
8
f
@ )
Prompts for second f
i
.
26
f
/)
Displays the counter.
f
%@ )
Prompts for the third x
i
.
14
f
@ )
Prompts for the third f
i
.
37
f
/)
Displays the counter.
You erred by entering 14 instead of 13 for x
3
. Undo your error by executing
routine U:
W
U
/)
Removes the erroneous data;
displays the revised counter.
f
%@)
Prompts for new third x
i
.
13
f
@ )
Prompts for the new third f
i
.