Question: The average time it takes for a customer service representative to resolve a support ticket is targeted to be 1 0 minutes per ticket in

The average time it takes for a customer service representative to resolve a support ticket is targeted
to be 10 minutes per ticket in average. To assess the efficiency of the support team, five samples
of four observations each have been recorded to measure the actual time it takes to resolve support
tickets. Use the sample data below in conjunction with Table in the slides to construct upper and
lower control limits for both sample mean and sample range control charts. Do the results suggest
that the process is in control?
The average time it takes for a customer service representative to

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