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Statistical Calculations
Once you have entered your data, you can use the functions in the statistics menus.
Menu
L.R.
y
x
,
s,σ
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
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
Statistics Menus
Key
º %
The linear–regression menu: linear
estimation {
{ }. See ''Linear Regression'' later in this
chapter.
º (
The mean menu: {
"Mean" below.
º +
The standard–deviation menu: { } { }
{σ } {σ }. See "Sample Standard
Deviation" and "Population Standard
Deviation" later in this chapter.
º .
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
Size : 13.7 x 21.2 cm
Description
ˆ
ˆ
} {
} and curve–fitting { } { }
} {
} { }. See "Summation Statistics"
Page : 386
} {
}. See
}
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