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Troyanec [42]
3 years ago
10

Suppose that 8% of all cars produced at Plant A have a certain defect, and 5\% of all cars produced at Plant B have this defect.

A quality control manager takes separate random samples of 150 cars from each plant. The manager will then look at the difference (A - B) between the proportions of cars with the defect in each sample. What will be the shape of the sampling distribution of the difference in sample proportions, and why?
Mathematics
2 answers:
RideAnS [48]3 years ago
8 0

Answer:

The answer is "Choice d"

Step-by-step explanation:

Please find the complete question in the attached file.

Faulty factory cars in a plant A = 8\% \ of\  150 \ = 12 > 10

Faulty factory cars in a plant B = 5\% \ of \  150 = 7.5 < 10

This condition of the normal distribution is not met so because the number of negative cars from plant B is less than 10, that's why the choice d is correct.

nirvana33 [79]3 years ago
7 0

Answer: D

Not normal, because we expect fewer than 10 defective cars in Plant B. .05*150=7.5

Step-by-step explanation: Khan Answer

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