Forty 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. n(-p) - Elp) (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(1-0)- E60) dy (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 no ECO)