Question: 5.7. For the data of Problem 5.6, do you think that the occurrences of cracks in castings would be independent, that is, if one casting

5.7. For the data of Problem 5.6, do you think that the occurrences of cracks in castings would be independent, that is, if one casting has a crack, this defect is unrelated to whether the next one has a crack? Might this account for the lack of control noted? Would you still investigate points outside of limits?

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