Question: Please answer this question. 3. A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly selected

Please answer this question.

3. A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly selected customers: 1) Construct control charts for ranges and means using the following table. Are any samples beyond the control limits? Source: Reprinted with permission from ASTM Manual on Qualily Control of Materials, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428 . 2) What is the average service time? Assuming the process standard deviation is 1.92 . If the nominal value for this service is 4.41 minutes. Is the process capable of 5 -sigma quality standard

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