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¥
55
¥
15.3
t
D
¥
90
Thus, we would expect that only about 1 percent of the students would do better
than score 90.
Keys:
(In RPN mode)
t
I
¥
0.1
¥
¥
0.8
Grouped Standard Deviation
The standard deviation of grouped data, S
points x
, x
, ... , x
1
2
This program allows you to input data, correct entries, and calculate the standard
deviation and weighted mean of the grouped data.
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
value
Display:
, occurring at positive integer frequencies f1, f2, ... , fn.
n
∑
2
x
f
i
=
S
∑
xg
(
Size : 13.7 x 21.2 cm
Stores 55 for the mean.
Stores 15.3 for the standard
deviation.
Starts the distribution program and
prompts for X.
Enters 90 for X and calculates Q(X).
Description:
Starts the inverse routine.
Stores 0.1 (10 percent) in Q(X) and
calculates X.
Resumes the inverse routine.
Stores 0.8 (100 percent minus 20
percent) in Q(X) and calculates X.
, is the standard deviation of data
xy
∑
(
x
) f
2
i
i
−
∑
i
f
i
−
) f
1
i
Statistics Programs
Page : 386
16–17
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