Repeat Exercise 20.43 and apply all of the diagnostic tests available with your statistical software. Has applying these diagnostics to the mean and range charts raised any concerns regarding the state of control of the process? If so, in what way(s)?
In exercise

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Pounds, Screw Number Sample Number 4 760 843 800 809 875 770 927 739 810 747 876 873 728 706 742 754 763 939 956 787 710 4 5 718 988 843 792