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Mathematics, 26.03.2021 01:20 ciel8809

A researcher is interested in the decrease in mean bone fractures in postmenopausal women treated with vitamin and calcium supplementation. Assuming that the population under investigation has a standard deviation of 3 bone fractures, and that the goal margin of error of the estimate is plus or minus 0.4 fractures. How many women should be sampled to attain an estimate with 95% confidence

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