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Statistical Operations
11–1
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
11
Statistical Operations
The statistics menus in the HP 33s provide functions to statistically analyze a set of
one– or two–variable data:
Mean, sample and population standard deviations.
Linear regression and linear estimation (
x
ˆ
and
y
ˆ
).
Weighted mean (x weighted by y).
Summation statistics: n,
Σ
x,
Σ
y,
Σ
x
2
,
Σ
y
2
, and
Σ
xy.
Entering Statistical Data
One– and two–variable statistical data are entered (or deleted) in similar fashion
using the
/
(or
¹
-
) key. Data values are accumulated as summation
statistics in six
statistics registers (28 through 33), whose names are displayed in
the SUMS menu. (Press
º
.
and see
).
Note
Always clear the statistics re
g
isters before enterin
g
a new set of
statistical data (press
¹
¡
{
} ).