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  1. H

    How to I prove a rate is at least x% higher than the other?

    Suppose I have option 1 and option 2. Option 1 yields a success rate of 80%, option 2 yields a success rate of 70%. The samples are independent. A z test can reject the H0 hypothesis and I can conclude that option 1 has a higher success rate. My question is: if I use a lowered success rate...