HP 35s Scientific Calculator - Manual (Page 170)

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
   


 