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A random sample of 5562 physicians in Colorado showed that 3062 provided at least some charity...

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Statistics

A random sample of 5562 physicians in Colorado showed that 3062provided at least some charity care (i.e., treated poor people atno cost).

(a) Let p represent the proportion of all Colorado physicianswho provide some charity care. Find a point estimate for p. (Roundyour answer to four decimal places.)

(b) Find a 99% confidence interval for p. (Round your answers tothree decimal places.) lower limit and upper limit

In a survey of 1000 large corporations, 256 said that, given achoice between a job candidate who smokes and an equally qualifiednonsmoker, the nonsmoker would get the job.

(c) Let p represent the proportion of all corporationspreferring a nonsmoking candidate. Find a point estimate forp. (Round your answer to four decimal places.)

(d)Find a 0.95 confidence interval for p. (Round youranswers to three decimal places.)

lower limit    

upper limit  

and

What is the margin of error based on a 95% confidence interval?(Round your answer to three decimal places.)

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