Consider the situation in Example 8.7. A new gauge is being evaluated for this process. The same operator measures the same 20 parts twice using the new gauge and obtains the data shown in Table 8E.8.

(a) What can you say about the performance of the new gauge relative to the old one?
(b) If specifications are at 25 ± 5, what is the P/T ratio for the new gauge?

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TABLE 8E.8 Measurement Data for Exercise 8.30 Part Measurements Number 2 Part Measurements Number 19 23 22 28 19 24 28 23 16 9 20 21 24 17 15 24 26 25 23 20 25 16 25 24 24 22 1 27 24 23 20 24 17 19 25 23 17 16 12 13 14 15 15 18 19 20 10