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Statistical Operations 12-1
12
Statistical Operations
The statistics menus in the HP 35s provide functions to statistically analyze a set of
one– or two–variable data(real numbers):
Mean, sample and population standard deviations.
Linear regression and linear estimation ( and ).
Weighted mean (x weighted by y).
Summation statistics: n, Σx, Σy, Σx
2
, Σy
2
, and Σxy.
Entering Statistical Data
One– and two–variable statistical data are entered (or deleted) in similar fashion
using the
(or ) key. Data values are accumulated as summation
statistics in six statistics registers (-27 through -32), whose names are displayed in
the SUMS menu. (Press
and see
).
Note
Always clear the statistics registers before entering a new set of
statistical data (press
()).
x
ˆ
y
ˆ