HP 32sII Scientific š4.6, š4.7, 6 ), 6 ), Price per Part (x), complete the process, Enters the first time, Enters the remaining data;, six data points accumulated

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):

15.5	9.25	10.0
12.5	12.0	8.5

Calculate the mean of the times. (Treat all data as x–values.)

Keys:Display:Description:

zb{´}					Clears the statistics registers.
15.5	6			)	Enters the first time.
9.25	610 612.5				Enters the remaining data;
612 68.5 6				)	six data points accumulated.
{/{			}		Calculates the mean time to
		º		)
					complete the process.

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) $4.25 $4.60 $4.70 S4.10Number of Parts (y) 250 800 900 1000

Find the average: price (weighted for the purchase quantity) for this part. Remember to enter y, the weight (frequency), before x, the price.

	Keys:	Display:	Description:
zb{´}			Clears the statistics registers.
250	š4.25 6 ) Enters data; displays n.
800	š4.6	6 )
900	š4.7	6 )

Statistical Operations 11–5

File name 32sii-Manual-E-0424
Printed Date : 2003/4/24	Size : 17.7 x 25.2 cm