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A researcher is interested in estimating average AGAR scores of babies born at elevation with a margin of error of 0.75, at the 90% confidence

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A researcher is interested in estimating average AGAR scores of babies born at elevation with a margin of error of 0.75, at the 90% confidence level. APGAR is measured on a continuous scale from 0 to 10, and indicates the health of the baby. What sample size is needed for this estimation? Assume the population standard deviation is 1.5. a. 12 b. 9 C. 15 d. 10 e. 11

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