Statistical Calculations; Mean - HP 33s User Manual

Statistical Calculations

Once you have entered your data, you can use the functions in the statistics menus.
Menu
º %
L.R.
y
x
º (
,
º +
s,
º .
SUMS

Mean

Mean is the arithmetic average of a group of numbers.
º (
Press
º (
Press
º (
Press
y –values as weights or frequencies. The weights can be integers or
non–integers.
Example: Mean (One Variable).
Production supervisor May Kitt wants to determine the average time that a certain
process takes. She randomly picks six people, observes each one as he or she
carries out the process, and records the time required (in minutes):
11–4
Statistical Operations
Statistics Menus
Key
The linear–regression menu: linear
estimation {
{  }. See ''Linear Regression'' later in this
chapter.
The mean menu: {
"Mean" below.
The standard–deviation menu: {  } {  }
{  } {  }. See "Sample Standard
Deviation" and "Population Standard
Deviation" later in this chapter.
The summation menu: {  } {  } {  } { 

{ 
later in this chapter.

{ } for the mean of the x –values.

{ } for the mean of the y –values.
 
{ } for the weighted mean of the x –values using the
Description
 ˆ  ˆ
} { } and curve–fitting {  } {  }
 
} {
} {  }. See "Summation Statistics"
 
} { }. See

}