Question: > Question 52 3 pts SUPERMARKET PROBLEM: Checkout time at a supermarket are being monitored. Six samples of 20 observations each have been obtained and

> Question 52 3 pts SUPERMARKET PROBLEM: Checkout

> Question 52 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 range chart using three-sigma control limits? Sample Mean Range 1 3.06 0.42 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 0.381 01.175 O 0.563 0 0.185

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