HP 35s User Manual

12-4 Statistical Operations
Statistical Calculations
Once you have entered your data, you can use the functions in the statistics menus.
Statistics Menus
Mean
Mean is the arithmetic average of a group of numbers.
 Press  ( ) for the mean of the x–values.
 Press Õ( ) for the mean of the y–values.
 Press
ÕÕ() for the weighted mean of the x–values using
the y–values as weights or frequencies. The weights can be integers or non–
integers.



Reenters the first data pair.
There is still a total of two
data pairs in the statistics
registers.
Menu Key Description
L.R.  
The linear–regression menu: linear estimation
and curve–fitting   . See ''Linear
Regression'' later in this chapter.
,
 
The mean menu: . See "Mean"
below.
s,σ


The standard–deviation menu:   σ σ.
See "Sample Standard Deviation" and
"Population Standard Deviation" later in this
chapter.
SUMS
 
The summation menu:    



. See "Summation Statistics" later in this
chapter.


ˆ

ˆ
x
y
  




HP 35s Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Black
Digits	14 digits
Display number of lines	2 lines
Keyboard type	Alphanumeric
Menus and prompts	Yes

Weight and Dimensions

Dimensions (WxDxH)	157.9 x 18 x 82 mm