The density of a product is measured every 5 hours and the results of consecutive measurements is provided in the attached excel file: Density Data: 89.11, 90.59, 91.03, 89.46, 89.78, 90.05, 90.63, 90.75, 89.65, 90.15, 88.55, 90.43, 91.04, 88.17, 91.23, 90.92, 88.86, 90.87, 90.73, 89.78. Creating and assessing control charts (using individual moving range and CUSUM) to determine if the process is stable and on target assuming a process target of 90. Explain your rationale.

Suppose that the next 10 observations are 90.75, 90.00, 92.00, 92.05, 91.70,90.65, 90.50, 91.00, 92.30, 91.70. How would this affect your analysis? Hint: You may want to consider the first 20 data points as a Phase 1 Study and the subsequent points as part of Phase 2 monitoring.