A disk drive manufacturer has a defect rate of less than 1.0% with 98% confidence. A quality assurance team samples 1000 disk drives and finds 14 defective units. Which action should the team recommend?
A.
The manufacturing process should be inspected for problems.
B.
A larger sample size should be taken to determine if the plant is functioning properly
C.
A smaller sample size should be taken to determine if the plant is functioning properly
D.
The manufacturing process is functioning properly and no further action is required.
This should be the answer
less than 1% vs 98%confidence
D.
The manufacturing process is functioning properly and no further action is required.
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test => 14/1000 = 0.014 which is greater than 1.0% or 0.010
Thus, A is correct.
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Agree
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You seem to have misinterpreted the meaning of confidence. In this case, they got the value of 1% after applying 98% confidence. That doesn’t mean that all future calculations need to be within the confidence rule.
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Correct answer is A.
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