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Improve the fevl readings in asthmatic patients

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Reference no: EM131716072

Question: Investigators are studying two drugs used to improve the FEVl readings (a measure of lung function) in asthmatic patients. Assume that σ = .8 and the difference in means they wish to detect is .25. If they want to do a two-sided test of equal population means with a = .05 and β = .20, what sample size should they use?

Reference no: EM131716072

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