PROBABILITY SAMPLES. Statistical Inference. 2 Jul 31, 2014 ยท INTRODUCTION TO SURVEY SAMPLING. , 2001. Steps in the Research Process Planning 1. The document provides a comprehensive overview of sampling techniques used in research, defining key terminology such as sample, population, and sampling methods. uic. It defines key sampling terms like population, sample, sampling frame, and discusses the need for sampling due to constraints of time and money for a full census. Methods to measure errors. Sample Surveys .