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04-11-2022
Mathematics

Answered

a conjecture by a faculty member in the microbiology department at washington university school of dental medicine in st. louis, missouri, states that a couple of cups of either green or oolong tea each day will provide sufficient fluoride to protect your teeth from decay. how large a sample is needed to estimate the percentage of citizens in a certain town who favor having their water fluoridated if one wishes to be at least 99% confident that the estimate is within 1% of the true percentage?

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