Question 1194871: The records of a light bulb manufacturer show that, when the manufacturing machinery is working correctly, the defect rate (due to imperfections in the material used) is 1%. The manufacturer's control department periodically tests samples of the bulbs, and when 1.5% or more are defective, they call repair technicians for service.
The control department is going to take a random sample of 4400 light bulbs. Let be the proportion of defective light bulbs in the sample assuming the machinery is working correctly.
Answer by ikleyn(52794)   (Show Source):
You can put this solution on YOUR website! .
The records of a light bulb manufacturer show that, when the manufacturing machinery is working correctly,
the defect rate (due to imperfections in the material used) is 1%. The manufacturer's control department
periodically tests samples of the bulbs, and when 1.5% or more are defective, they call repair technicians for service.
The control department is going to take a random sample of 4400 light bulbs. Let be the proportion of defective
light bulbs in the sample assuming the machinery is working correctly.
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I do not see any relevant question in this post,
so I do not understand for which purpose it was submitted to the forum.
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