I need to test if a change to my line will adversely affect yields but I am not sure if I am using the correct values for Proportion 2 and the Null Difference in Proportion in the Sample Size and Power calculator for Two Sample Proportions. I am expecting the process change to have no effect on yield but want to design a test that would have high power of detecting a 1% drop. For Alpha=0.05 and Power=0.80, which of the options below is correct? Option A Proportion 1: 0.94 Proportion 2: 0.94 Null Difference in Proportion: -0.01 Option B Proportion 1: 0.94 Proportion 2: 0 .93 Null Difference in Proportion: 0 Regards S
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