Question: 1. Checkout time at a supermarket is monitored using a mean and a range chart. Six samples of n=20 observations have been obtained and the

1. Checkout time at a supermarket is monitored using a mean and a range chart. Six samples of n=20 observations have been obtained and the sample means and ranges computed: Determine upper and lower limits for mean and range charts. Is the process in control? Mean chart: UCL=x+A2R LCL=xA2R Range chart: LCL=D3R UCL=D4R PLEASE ANSWER USING EXCEL AND USE THIS FORMAT

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