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I require help with solving this problem? A random sample of medical files is used to estimate the proportion p of all people who have

I require help with solving this problem?

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A random sample of medical files is used to estimate the proportion p of all people who have blood type B. If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 98% sure that the point estimate p will be within a distance of 0.08 (margin of error) from p ? Critical value for 98% is 2c=2.33. O 849 O 15 0 8 O 425 O 213

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