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6. Repeat steps 3 through 5 for each data point.
If you discover that you have made a data-entry error (x
¥
pressed
back to step 3 to enter the correct data.
7. When the last data pair has been input, press
display the grouped standard deviation.
¥
8. Press
to display the weighted mean of the grouped data.
9. To add additional data points, press
To start a new problem, start at step 2.
Variables Used:
X
F
N
S
M
i
Register 28
Register 29
Register 31
Example:
Enter the following data and calculate the grouped standard deviation.
Group
x
i
f
i
Keys:
(In RPN mode)
t
S
16–20
Statistics Programs
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
t
in step 4, press
Data point.
Data–point frequency.
Data–pair counter.
Grouped standard deviation.
Weighted mean.
Index variable used to indirectly address the correct
statistics register.
Summation Σf
.
i
Summation Σx
f
.
i
i
2
Summation Σx
f
.
i
i
1
2
5
8
17
26
Display:
value
Size : 13.7 x 21.2 cm
or f
i
¥
U and then press
t
G to calculate and
¥
and continue at step 3.
3
4
5
13
15
22
37
43
73
Description:
Prompts for the first x
Page : 386
) after you have
i
again. Then go
6
37
115
.
i
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