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Post a reply: Sample size estimation for follow up CSAS survey

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We are doing a sort of follow up coverage assessment after two years of CMAM program. The project had a baseline coverage estimate in 2011 (used CSAS). The project targets >70% coverage by now. So, how shall we approach the task? 1. Use the one point 50%+/-10% 2. Use the classical difference of two proportions estimation and correct for size 3. any other way which I am not clear Thanks for your support
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