Jill A Rabinowitz, Sally I-C Kuo, William Felder, Rashelle J Musci, Amie Bettencourt, Kelly Benke, Danielle Y Sisto, Emily Smail, George Uhl, Brion S Maher, Anthony Kouzis, Nicholas S Ialongo
Associations between an educational attainment polygenic score with educational attainment in an African American sample
Genes, brain, and behavior
sample surveys essential approach used veterinary research investigation sample obtained welldesigned sampling process along robust data analysis provide valuable insight attributes target population two approaches designbased modelbased used inferential frameworks analysing survey data compared modelbased approach designbased approach usually straightforward directly makes inferences finite target population dairy cows herd dogs region rather infinite superpopulation paper concept probability sampling designbased approach briefly reviewed followed discussion estimations justifications context several different elementary sampling methods including simple random sampling stratified random sampling onestage cluster sampling finally concrete example complex survey design involving multistage sampling stratification demonstrated illustrating finding unbiased estimators corresponding variance formulas complex survey builds techniques used elementary sampling methods