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1.A team of medico research experts feels confident that a new drug they have developed will cure about 80% of the patients. How large should

1.A team of medico research experts feels confident that a new drug they have developed will cure about 80% of the patients. How large should the sample size be for the team to be 98% certain that the sample proportion of cure is within plus and minus 2% of the proportion of all cases that the drug will cure?

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