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A recent survey found that 69% of all adults over 50 wear glasses for driving....

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A recent survey found that 69% of all adults over 50 wear glasses for driving. In a random sample of 70 adults over 50, what is the mean and standard deviation of those that wear glasses? mean: 48.3; standard deviation: 6.95mean: 48.3; standard deviation: 3.87mean: 21.7; standard deviation: 3.87mean: 21.7; standard deviation: 6.95

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