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7. The health teachers at Vancouver High School (VHS) want to estimate the BMI (body mass index) of female students at VHS. The BMI index

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7. The health teachers at Vancouver High School (VHS) want to estimate the BMI (body mass index) of female students at VHS. The BMI index of young American women follows a normal distribution with a standard deviation of 8.1%. How large of a sample is needed to estimate the mean BMI of VHS female students within 3% with 98%confidence

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