Related by context. Frequent words. (Click for all words.) 58 random sample 55 random sampling 53 scientifically valid 49 sample 46 unscientific 46 statistical analysis 45 generalizable 45 surveys 44 extrapolated 44 representativeness 43 randomly selected 43 accurate 42 statistically significant 42 subsample 42 nonscientific 42 dataset 42 undercounts 42 theoretical sampling error 41 epidemiologic studies 41 statistical significance 41 extrapolation 41 statistically 40 sampling 40 survey 40 extrapolate 40 multivariate 40 NHANES 40 methodology 39 tabulated 39 undercounted 39 observational study 39 empirical 39 statistical analyzes 39 extrapolations 39 longitudinal studies 39 confirmatory 39 census tract 38 prospective cohort 38 empirically 38 meta analysis 38 measurements 38 unbiased 38 post hoc 38 reanalysis 38 census 38 qualitative 38 generalize 38 measurement 38 unrepresentative 38 Interview Survey 38 quantifiable 38 quantitative 37 Factor Surveillance 37 epidemiologic 37 conclusive 37 Environics 37 census tracts 37 liver biopsy 37 subjective 37 reasonable 37 analysis 37 standardized 37 MORI 37 scientifically 37 censuses 37 longitudinal study 37 unduplicated 36 legally defensible 36 questionnaires 36 Gallup Healthways Well 36 Knowledge Networks 36 scientifically validated 36 quantitatively 36 subset 36 validated 36 Behavioral Risk 36 evaluative 36 Extrapolating 36 meta analyzes 36 sampling error margin 36 achieve statistical significance 36 stratified random sample 36 defensible 36 unweighted 36 validate 36 reach statistical significance 36 Nutrition Examination Survey NHANES 36 tabulate 36 reanalyzed 36 Mortgage Disclosure 35 randomly chosen 35 Harris Decima 35 accurately 35 longitudinal 35 accurately reflect 35 spirometry 35 psychographic 35 undercounting 35 conducted 35 study 35 Vision Critical