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For a clinical trial two group of patients are needed, one for the experimental drug and the other one of the standard drug. researches think

For a clinical trial two group of patients are needed, one for the experimental drug and the other one of the standard drug. researches think the proportion of patient should cure with the experimental drug is 92% and the proportion of patient who cure with standard drig is 75%

calculate the sample size for this trial if the hypothesis for that study is proportion of patient who cures using experimental and standard drug are different?

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