Sampling 166 Statistics 70 sampling 44 Sampling (Statistics) 41 Probability 33 Sampling Theory 26 probability 22 regression 21 Interviewing techniques 15 Random sampling 13 Air sampling 12 Baseline surveys 11 Regression 11 Research design 10 Research methodology 10 SAMPLING 10 correlation 10 Correlation 9 Regression analysis 9 Sampling theory 9 sampling techniques 9 Sampling techniques 8 Soil sampling 8 Water analysis 8 Air analysis 7 Sample design 7 Social surveys 7 Soil analysis 7 Environmental sampling 6 Mathematical statistics 6