New PMP Question & Answers with explanation

A project manager discovers a defect in a deliverable due to the customer under contract today. The project manager knows the customer does not have the technical understanding to notice the defect. The deliverable meets the contract requirements, but it does not meet the project manager`s quality standard. What should the project manager do in this situation?
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What percentage of the total distribution are 3 sigma from the mean equal to?
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If a project manager focuses on ensuring that the project satisfies the needs for which it was undertaken, the project manager is involved in:
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What might historical records from previous projects used as an input to activity definition include?
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All of the following are examples of the cost of nonconformance except:
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