The AMS technical services team has embarked on a quality improvement effort. Its first pr...

The AMS technical services team has embarked on a quality improvement effort. Its first project relates to maintaining the target upload speed for its Internet service subscribers. Upload speeds are measured on a device that records the results on a standard scale in which the target value is 1.0. Each day five uploads are randomly selected, and the speed of each upload is measured. Table AMS14.1 presents the results for 25 days (stored in ).

Table AMS14.1 Upload Speeds for 25 Consecutive Days

a. Construct the appropriate control charts for these data.

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b. Is the process in a state of statistical control? Explain.

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c. What should the team recommend as the next step to improve the process?