The following data represent measurements made on a process for 30 days. One measurement w...

The following data represent measurements made on a process for 30 days. One measurement was made each day. Assuming that 30 measurements are enough that × s m and s s s, find the mean of the values, the standard deviation, and the upper and lower control limits. Plot the data points along with the statistical quantities on a chart, and determine whether the process was always in statistical control.