What is a sample?

What is a sample?

• A. A full census of the population
• B. Subset of population of interest with clear definitions and measurements through examination of methodology
• C. A single individual's data
• D. A theoretical construct

Answer: (B)

A sample is a subset of the population of interest that is clearly defined and measured using a specified sampling method. This means you pick a part of the group you want to study and decide who belongs and what you will measure, following a defined process. That combination—defined eligibility for inclusion and a clear methodology for how data are collected—lets researchers draw inferences about the larger population without surveying everyone. The other options describe a census (the whole population), a single individual's data (just one case, not a sample), or a theoretical idea (not empirical data), which don’t fit the concept of a sample.

A sample is a subset of the population of interest that is clearly defined and measured using a specified sampling method. This means you pick a part of the group you want to study and decide who belongs and what you will measure, following a defined process. That combination—defined eligibility for inclusion and a clear methodology for how data are collected—lets researchers draw inferences about the larger population without surveying everyone. The other options describe a census (the whole population), a single individual's data (just one case, not a sample), or a theoretical idea (not empirical data), which don’t fit the concept of a sample.