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Avg Range Scenario 3: The manager of a branch of a local bank wants to study the wait times for customers for teller services during the peak 12 noon to 1 pm lunch hour. A subgroup of three customers is selected (one at each 15-minute interval during the hour), and the time (wait time in minutes) is recorded. See the data shown to the right Use this data to answer the questions that follow. Walt Time (minutes) Subgroup Cust 1 Cust2 CLB3 8.4 7.9 5.6 8.7 5.5 80 5.4 9.7 4.6 vw to 7.20 5.93 6.37 8.77 S = 0 O CO N Un A to N 4 0.80 1.90 6 1.60 10 7 8.72 What is the Upper Control Limit for the Average Chart? Show your answer to two decimals 3.06 What is the Lower Control Limit for the Average Chart? Show your answer to two decimals. 7.12 What is the Upper Control Limit for the Range Chart? Show your answer to two decimals. Plot the average and range charts below. 2.90 3.90 4.53 5.89 63 8. R 9. 3 Go 1.023 2.575 0 Chart for Ranges Chart for Subgroup Averages Wait Time (minutes) Subgroup Cust. 1 Cust 2 Cust. 3 Avg Range 1.20 5.6 4.10 4 5.93 00 3.60 5.10 0.80 6.77 5.53 LUDI 3 1.90 KOK 9 4 1.60 O 10 2.90 2B 4.63 5.89 2.60 3.60 2.77 RE 3 1.023 0 2.575 Scenario 3. The manager of a branch of a local bank wants to study the wait times for customers for teller services during the peak 12 noon to 1 pm lunch hour. A subgroup of three customers is selected (one at each 15-minute interval during the hour), and the time (wait time in minutes) is recorded. See the data shown to the right. Use this data to answer the questions that follow. 6. 7 8.72 What is the Upper Control Limit for the Average Chart? Show your answer to two decimals 3.06 What is the Lower Control Limit for the Average Chart? Show your answer to two decimals What is the Upper Control Limit for the Range Chart? Show your answer to two decimals Plot the average and range charts below. 8 O