Suppose that following the construction of the x and R control charts in Exercise 6.34, the process engineers decided to change the subgroup size to n = 2. Table 6E.16 contains 10 new subgroups of thickness data. Plot this data on the control charts from Exercise 6.34(a) based on the new subgroup size. Is the process in statistical control?

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TABLE 6E. 16 Additional Thickness Data for Exercise 6.36 Subgroup 454 449 442 443 446 454 458 450 443 457 21 449 441 442 23 24 25 26 27 28 29 30 459 448 449 449 440 450