HP 33S User Manual

Statistics Programs
16–17
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
55
¥


Stores 55 for the mean.
15.3
¥

Stores 15.3 for the standard
deviation.
t
D

value

Starts the distribution program and
prompts for
X.
90
¥


Enters 90 for X and calculates Q(X).
Thus, we would expect that only about 1 percent of the students would do better
than score 90.
Keys:
(In RPN mode)
Display: Description:
t
I


Starts the inverse routine.
0.1
¥


Stores 0.1 (10 percent) in Q(X) and
calculates
X.
¥


Resumes the inverse routine.
0.8
¥


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 f
1
, f
2
, ... , f
n
.
∑
∑
∑
∑
−
−
=
1
2
2
)f(
f
)fx(
fx
S
i
i
ii
ii
xg
This program allows you to input data, correct entries, and calculate the standard
deviation and weighted mean of the grouped data.

HP 33S Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Silver
Digits	10 digits
Display number of lines	2 lines
Keyboard type	Alphanumeric
Menus and prompts	Yes

Weight and Dimensions

Dimensions (WxDxH)	157 x 16 x 81 mm