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7 A random sample of medical files is used to estimate the proportion p of all people who have blood type B. If you have

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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 99% sure that the point estimate ? will be within a distance of 0.07 from p? SHOW WORK REQUIRED! Show the formula and how you got your answer. 1359 O 19 O 10 O 680 O 340

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