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.)
