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15.5
12.5
Calculate the mean of the times. (Treat all data as x–values.)
Keys:
¹ ¡
/
15.5
/
9.25
10
/
12
8.5
º (
{
Example:
Weighted Mean (Two Variables).
A manufacturing company purchases a certain part four times a year. Last year's
purchases were:
Price per Part (x)
Number of Parts (y)
Find the average price (weighted for the purchase quantity) for this part.
Remember to enter y, the weight (frequency), before x, the price.
Keys:
¹ ¡
Ï
250
Ï
800
Ï
900
Ï
1000
º (
{
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
9.25
12.0
{ }
/
/
12.5
/
}
{ }
/
4.25
/
4.6
/
4.7
/
4.1
}
Size : 13.7 x 21.2 cm
10.0
8.5
Display:
Clears the statistics
registers.
Enters the first time.
Enters the remaining data;
six data points
accumulated.
Calculates the mean time to
complete the process.
$4.25
$4.60
$4.70
250
800
900
Display:
Clears the statistics
registers.
Enters data; displays n.
Four data pairs
accumulated.
Calculates the mean
price weighted for the
quantity purchased.
Statistical Operations
Page : 386
Description:
$4.10
1000
Description:
11–5
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