Concept of Sampling: Meaning of Sampling, Importance of Sampling, Data Collection Method, Census and Survey, uses of Sample Survey, Principle Steps in Sample Survey, Advantage of Sampling, and Limitation of Sampling.
Non-probability sampling: Convenience Sampling, Accidental Sampling, Purposive Sampling, Judgment Sampling, Snowballs Sampling, Area Sampling.
Probability Sampling: Simple Random Sampling, Stratified Sampling, Systematic Sampling, Cluster Sampling. Errors in Survey.