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9. A researcher is interested in estimating average birth weights of babies born at elevation with a margin of error of 0.8, at the 95%

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9. A researcher is interested in estimating average birth weights of babies born at elevation with a margin of error of 0.8, at the 95% confidence level. Birth weight is measured on a continuous scale. What sample size is needed for this estimation? Assume the population standard deviation is 2.3. 0 10 0 32 0 23 O 12 0 15 02

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