A sampling frame in health services research is best described as the list of sampling units from which a sample is selected. This ensures that the sample adequately represents the population being studied, leading to more reliable conclusions. Proper identification and use of a sampling frame is crucial in research methodology. ;
A sampling frame in health services research is best described as the list of sampling units from which a sample is selected. This ensures representative samples and reliable findings. Therefore, the correct option is C.
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