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Questions asking about the normal approximation

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These are questions asking about the normal approximation, when it applies and when it doesn't.

1)A kitchen cabinet business has primarily homeowners as customers, but the business also has a few customers who are developers that build multi-unit condominiums. Overall, the average sale is $20,000, with a median sale of $10,000. Which of the following would be closest to a normal distribution?

A)the histogram of the next 50 individual sales

B)the histogram of the last 50 individual sales

C)the histogram of the average sales (sampling distribution) for random samples of size 5

D)the histogram of the average sales (sampling distribution) for random samples of size 40

2)It is known that 5% (p = 0.05) of a particular brand of fuses is defective. Which of the following would be closest to a normal distribution (normal curve)?

A)the histogram of sample proportions of defective fuses for samples of size n =1

B)the histogram of sample proportions of defective fuses for samples of size n = 5

C)the histogram of sample proportions of defective fuses for samples of size n = 20

D)the histogram of sample proportions of defective fuses for samples of size n = 200

Reference no: EM132153576

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