A manufacturer products pencils. The average defect rate is known to be 0.028. T

Question

A manufacturer products pencils. The average defect rate is known to be 0.028. This production process is assumed to be in control if the defect rate is within three standard deviations of the mean. Samples are taken of 200 pencil each What is the upper control limit for this process? 0.112 0.084 0.0787 0.063 0.0597 A customer attempts to return a product after the warranty expiration. Checking the purchase date to prevent such returns would be a(a)___activity. logistic filtering nullifying blocking gate keeping none of the above What is the project completion time? 19 days 18 days 17 days 16 days 15 days What is the slack for task G? zero days one days two days three days four days

Explanation / Answer

Answer:

1. The upper control limit shall be 0.063 because for this value of defect rate the standard deviation comes lower to 3 [(0.063 - 0.028)2 / 200]1/2 and above this the standard deviation is more than 3.

The correct answer is Option D.

2. The correct answer is Option A. Checking such things is a Logistic Fitering Activity.

3. The Project Completion Time is the longest time that is 19 days ( A - C - F - H - I). The correct answer is Option A.

4. The slack time is the time till which an activity can be delayed without affecting the project time. For G the slack time is 3 days (19 days - 4 days = 15 days and normal time of completion of G is 12 days). The correct answer is Option D. three days.

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