HP 33s User Manual page 149
Scientific
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Also See for 33s:
- Owner's manual (386 pages) ,
- User manual (9 pages) ,
- Instruction manual (7 pages)
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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
4.25
Ï
/
800
4.6
Ï
/
900
4.7
Ï
1000
4.1
º (
{
}
9.25
12.0
Display:
/
12.5
$4.25
250
Display:
/
/
10.0
8.5
Clears the statistics
registers.
Enters the first time.
Enters the remaining data;
six data points
accumulated.
Calculates the mean time to
complete the process.
$4.60
$4.70
800
900
Clears the statistics
registers.
Enters data; displays n .
Four data pairs
accumulated.
Calculates the mean
price weighted for the
quantity purchased.
Statistical Operations
Description:
$4.10
1000
Description:
11–5
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