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Post a reply: Calculating variance and DEFF for stratified sampling

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I would like to request assistance in calculating variance for stratified PPS sampling. Let's say we do a survey with 3 strata with the following populations and prevalence of malnutrition in a 30 X 7 survey: Strata Population Sample Prevalence Weight 1 9,870 225 81.3% 0.4997 2 33,599 219 54.8% 1.7475 3 14,130 212 31.1% 0.7590 I calculated the weights from the population and sample for each of the strata, and also calculated the weighted prevalence which is 53.22%. I would like assistance in calculation of the variance and design effect in this case. Thanks in advance!
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