Question: Ateller at a drive-up window at a bank had the following service times in minutes) for 20 randomly selected customers: SAMPLE 1 | 2 |

Ateller at a drive-up window at a bank had the

Ateller at a drive-up window at a bank had the following service times in minutes) for 20 randomly selected customers: SAMPLE 1 | 2 | 3 | 4 4.5 4.6 4.5 4.7 4.2 4.5 4.6 4.6 4.2 4.4 4.4 4.8 4.3 4.7 4.4 4.5 4.3 4.3 4.6 4.9 If the process has a known mean of 4.3 and a known standard deviation of 0.18, what would be the LCL for three- sigma control limits? Round your answer to 2 decimals. Answer: 3.86

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