HP F2216A hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 149
Weighted Mean Two Variables., Price per Part x, Number of Parts y, Remember to enter
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15.5 12.5 9.25 12.0 10.0 8.5 Calculate the mean of the times. (Treat all data as x-values.) Keys: { c {´} Display: 15.5 9.25 10 12.5 12 8.5 ) ) | {º} ) Description: Clears the statistics registers. Enters the first time. Enters the remaining data; six data points accumulated. Calculates the mean time to 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) Number of Parts (y) $4.25 $4.60 $4.70 $4.10 250 800 900 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: { c {´} 250 4.25 800 4.6 900 4.7 1000 4.1 | {º·} 8 ) Clears the statistics registers. Enters data; displays n. Four data pairs accumulated. Calculates the mean price weighted for the quantity purchased. Statistical Operations 11-5