HP 32SII, Руководство пользователя

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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
i
2
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
.