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Determining Differences in Defect Levels

The Allbest software company owns two computer-manufacturing plants. Each plant produces the Ultimate computer model. Plant measurement has determined that 28 out of 452 tested computers at Plant A were defective and that 21 out of 505 tested at plant B were defective. Is there cause for concern that the defect levels at these two plants differ? Please explain in detail.

Solution Summary

This solution provides calculations in Excel for determining differences in defect levels.

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