Question: Problem 5 A quality inspector took five samples in five hours, each with four observations, of the length time for glue to dry. The analyst

Problem 5 A quality inspector took five samples in five hours, each with four observations, of the length time for glue to dry. The analyst compute the mean of each sample and the computed the grand mean. All values are in minutes. Use this information to obtain three-sigma control limits for means. It is known from previous experience that the standard deviation of the process is 0.02 minutes. Observation/Sample 1 12.11|12.15|12.09 12.1212.09 2 3 4 5 1 2 12.10 12.12.12.09 12.10 12.14 3 12.11 12.10 12.11 12.08|12.13 4 12.08 12.11|12.15 12.10 12.10 12.10 12.12 12.11 12.10 12.12 3

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