Question: Construct mean and range chart for the following: A quality inspector took ten samples, each with five observations, of the length of time for paint

Construct mean and range chart for the following:

A quality inspector took ten samples, each with five observations, of the length of time for paint 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 three-sigma (i.e., z = 3) control limits for the means of future time. It is known from previous experience that the standard deviation of the process is 0.06 minute. Construct mean and range chart for the following:

Sample Observation() Average Range 15.11 14.92 15.09 15.01 1491 2 15.06 15.03 1492 1497 15.07 1492 15.02 1493 15.01 15.09 1502 14.93 14.96 1504 15.08 1493 15.02 14.99 15.07 15.10 15.11 15.05 15.09 14.99 1497 7 15.03 1492 15.09 15.05 1496 1496 15.05 14.99 15.09 1508 15.12 14.98 15.06 15.08 1499 10 1498 15.08 15.06 1497

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