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Mathematics, 16.11.2019 05:31 ilpark0125
Arandom sample of medical files is used to estimate the proportion p of all people who have blood type b.
(a) if you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 85% sure that the point estimate p will be within a distance of 0.07 from p?
files
(b) answer part (a) if you use the preliminary estimate that about 13 out of 90 people have blood type b.
medical files
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