Sampling (Statistics) 41 Social surveys 6 Mathematical statistics 4 Social sciences 4 Clinical medicine 3 Methodology 3 Research 3 Sampling--Statistical mathematics--Applied mathematics 3 Statistics 3 Surveys 3 Biometry 2 Group work in research 2 Mass media 2 Mathematical models 2 Probabilities 2 Qualitative research 2 R (Computer program language) 2 Sample Size 2 Sampling-- Statistical mathematics-- Applied mathematics 2 Scientific surveys 2 Social service 2 Social workers 2 Accelerated life testing 1 Agricultural entomology 1 Agricultural pests 1 Analysis of variance 1 Approximation theory 1 Arthropod pests 1 Binomial distribution 1 Business-Research -Methodology 1