Assessing between-block heterogeneity within the post-strata of the 1990 Post-Enumeration Survey
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"The 1990 [U.S.] Post-Enumeration Survey (PES) stratified the population into 1,392 subpopulations called post-strata based on location, race, tenure, sex and age, in the hope that these subpopulations were homogeneous in relation to factors affecting the Cens... ...