Question: please show each step on how to get the values for A2, D3, D4 Wait time (brs) at the DMV is monitored using a mean

please show each step on how to get the values for A2, D3, D4

Wait time (brs) at the DMV is monitored using a mean and a range chart. Five samples of n=15 observations have been obtained and the sample means and ranges computed: Sample 2 3 4 5 Mean 1.73 2.56 1.24 0.53 0.79 Range 0.48 0.37 0.41 0.46 0.49 a) Determine upper and lower limits for mean and range charts. b) Is the process in control

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