Question

1) People end up tossing 12% of what they buy at the grocery store. Assume this is the true population proportion and that you plan to take a sample survey of 540 grocery shoppers to further investigate their behavior. Show the sampling distribution of p, the proportion of groceries thrown out by your sample respondents. If required, round your answer to four decimal places.

2) eBook

Twenty-two percent of primary care doctors think their patients receive unnecessary medical care. If required, round your answer to four decimal places.

(a) Suppose a sample of 300 primary care doctors was taken. Show the distribution of the sample proportion of doctors who think their patients receive unnecessary medical care.

np =

n(1-p) =

E(p) =

σ(p) =

(b) Suppose a sample of 500 primary care doctors was taken. Show the distribution of the sample proportion of doctors who think their patients receive unnecessary medical care.

np =

n(1-p) =

E(p) =

σ(p) =

(c) Suppose a sample of 1,000 primary care doctors was taken. Show the distribution of the sample proportion of doctors who think their patients receive unnecessary medical care.

np =

n(1-p) =

E(p) =

σ(p) =

Answer 1