A sampling frame operationalizes the target population by listing units that can potentially be included in the sample. Examples include voter lists, school registers or membership databases. The quality of the frame affects representativeness because omissions or duplications can bias selection. Thus, it is the practical source list from which sample units are chosen.
Option A:
Option A defines the population, which is the broader group of interest, not necessarily the actual list used for sampling.
Option B:
Option B is correct as it highlights the frame as the list or device from which sampling occurs. It connects the conceptual population to the operational step of sample selection.
Option C:
Option C refers to the achieved sample or respondents, which may be smaller than the selected sample due to nonresponse. This is not the sampling frame.
Option D:
Option D describes the questionnaire, which is a data collection tool, not the list of units.
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