COMM 225 Review Problems withSolution Final Exam

# COMM 225 Review Problems withSolution Final Exam

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COMM 225: SOLUTION TO REVIEW QUESTIONS (FINAL EXAM MATERIALS)

                              TOPIC: STATISTICAL PROCESS CONTROL


Q 3.1: A certain molded part is examined for conformity in diameter, and for the presence of excessive flashing.

Equal-sized samples are taken at 15-min intervals throughout the eight-hour working day. For each sample,

the mean and the range of the diameters are recorded, and a notion is made if any of the sampled parts have

excessive flashing.

     Sample Mean          Range        Sample Mean             Range        Sample Mean   Range

1              0.2             6          2        0.3           11       0.1

2              0.3             7              0.2           12      0.1

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COMM 225
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