Find the minimum sample size required to estimate an unknown population mean a recent study reported that of adults

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1.Find the MINIMUM SAMPLE SIZE required to estimate an UNKNOWN POPULATION MEAN: A recent study reported that 70% of adults ...

d that 70% of adults go to the doctor for their yearly checkup. If you want to test the validity of this claim, how many adults must be surveyed in order to be 90% confident that the sample percentage is in error by no more than 5 percentage points?

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