The document discusses simple random sampling methods. It describes how simple random sampling involves giving each unit in the population an equal chance of being selected, either with or without replacement. Researchers often use random number tables to generate simple random samples by numbering units and selecting numbers from the table. For example, a researcher could sample 10 television programs out of 100 total by numbering programs 00-99 and choosing 10 random numbers. Simple random samples for surveys can also be obtained through random digit dialing or address-based dialing. The key aspects of random sampling are that each unit has an equal chance of selection and the process is free from subjective intervention.