A pizza delivery service wants to track their delivery times. They take eight samples of four deliveries and record the following data. What are the upper and lower control limits of their X-bar chart?
Sample # 1 2 3 4 5 6 7 8
Item #1 21.1 20.2 24.1 22.6 21.2 20.9 22.4 20.9
Item #2 21.7 20.6 21.7 21.7 24.1 23.5 24.6 24.7
Item #3 23.0 24.5 23.2 23.0 20.6 22.8 23.4 22.8
Item #4 20.3 23.5 24.4 25.0 20.7 23.2 23.3 24.5
Sum 86.1 88.8 93.4 92.3 86.6 90.4 93.7 92.9
A) 24.9, 20.3
B) 23.8, 21.4
C) 22.6, 19.5
D) 21.1, 17.6
Answer: A
You might also like to view...
The industry concept of competition reveals a broader set of actual and potential competitors than competition defined in just the market concept
Indicate whether the statement is true or false
Beginning in 1991 Argentina conducted its monetary policy through a currency board. In January 2002, Argentina abandoned the currency board and allowed its currency to float against other currencies. The country took this step because:
A) the Argentine Peso had grown too strong against major trading powers thus the currency board policies were hurting the domestic economy. B) the United States required the action as a prerequisite to finalizing a free trade zone with all of North, South, and Central America. C) the Argentine government lost the ability to maintain the pegged relationship as in fact investors and traders perceived a lack of equality between the Argentine Peso and the U.S. dollar. D) all of the above