Question: se it hasn't been activated. Activate large should our sample be? ($) A health planning agency wishes to know, for a certain city, what proportion

se it hasn't been activated. Activate large should our sample be? ($) A health planning agency wishes to know, for a certain city, what proportion of patients admitted to hospitals for the treatment of head injuries die in the hospital. A 95 percent confidence interval is desired, the desired error is 3.5%. If the estimated population proportion N is 0.15, how large a sample is needed? How large a sample would be needed if there was no preliminary estimate N of the population proportion? The data represent intraocular pressure (mm Hg) values recorded for a sample of 21 elderly subjects. Can we conclude from these data that the mean of the population from which the sample was drawn is greater than 14

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