Variance estimation with post stratification. Suppose we post stratify the sample into L post strata, with population
Question:
Where
And xli =1 if unit i is in post stratum l and 0 otherwise. Show, using linearization, that
We can thus let
and estimate V(ṫpost) by
Transcribed Image Text:
Ni Ν; l-I l=2.wixliyi, Ni= ies 1-1
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