Question: A quality inspector took five samples, each with four observations (n= 4), of the length of time for glue to dry. All values are in

A quality inspector took five samples, each with four observations (n= 4), of the length of time for glue to dry. All values are in minutes. Use this information to obtain three-sigma (i.e., z = 3) control limits. Construct three sigma mean and range charts. Determine if corrective action is needed. SAMPLE 1 J 4 Observation 2 3 1211 12.10 12.11 12.08 2 12.15 12.12 1210 12.11 12.09 1209 1211 12.15 1212 12.10 12.08 12.10 12.09 12.14 1213 12.12 Chapter 10 Glue Drying Problem - Answer Sheet X double bar R bar UCL x bar Show calculation: LCL x bar Show calculation: Show calculation: UCLR Show calculation: LCL R If not, what is the problem Using X bar, is the process in control If not, what is the problem Using R, is the process in control

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