Question: 1. Quality inspector took five samples (K=5), each with four observations (n=4), of the length of time for glue to dry. The analyst computed the

1. Quality inspector took five samples (K=5), each with four observations (n=4), of the length of time for glue to dry. The analyst computed the mean of each sample and then computed the grand mean. All values are in minutes. Use this information to obtain upper controllimit and lower controllime of the process. Observati 1 2 3 4 5 X-bar R on 1 1 12.11 12.15 12.09 12.12 12.09 2 12.10 12.12 12.09 12.10 12.14 3 12.11 12.10 12.15 12.08 12.13 4 12.8 12.11 12.11 12.10 12.12 a) Determining control limits for means X-double bar= ? R-bar UCL= X-double +( bar R-bar*A2) LCL =X-double bar - (R-bar*A2) A2= Find a factor from table b) Determining control limits for ranges R-bar UCLER-BAR*d4 LCL= R-bar*D3 D3, and D4= Find a factors from table

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