Question: Question 53 3 pts SUPERMARKET PROBLEM: Checkout time at a supermarket are being monitored. Six samples of 20 observations each have been obtained and the

Question 53 3 pts SUPERMARKET PROBLEM: Checkout

Question 53 3 pts SUPERMARKET PROBLEM: Checkout time at a supermarket are being monitored. Six samples of 20 observations each have been obtained and the sample means and ranges calculated as shown in the table. What is LCL for the mean chart using three-sigma control limits? Mean Sample 1 Range 0.42 3.06 2 3.15 0.51 3 3.11 0.41 4 3.13 0.46 5 3.06 0.46 6 3.09 0.45 O 2.756 O 3.019 O 3.376 2.085

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