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1) The difference in LS means between 2 groups (Trt B - Trt A) and their SE (standard error)
I am mystified by the request. Your data does not have any continuous variables, so there is no way to compute any type of mean.
2) 95 % CI based on a 2-sided Chan and Zhang method for the difference in proportions
Search the forums for "Chan and Zhang"
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