How many is enough? Justifying sample size in descriptive quantitative research
Year: 2025
Type: article
Abstract: BACKGROUND: Descriptive quantitative researchers often use surveys to collect data about a group or phenomenon. Determining the required sample size in descriptive surveys can pose a challenge as there is no simple 'formula' by which to calculate an appropriate sample. However, when a sample is too small the study may fail to answer the research question and too many responses can create resource implications. AIM: To explore considerations regarding the justification of adequate sample size in descriptive quantitative research. DISCUSSION: Several considerations may assist quantitative descriptive researchers in examining the appropriateness and justification of sample size. Response rates can guide decision-making around the proportion of the target population who respond. Additionally, consideration of any validated tools, the spread or responses and types of analysis can guide sampling decisions. CONCLUSION: The strategies in this article provide a considered approach to justifying sample size in descriptive quantitative research. Factors such as response rates and analytical considerations provide a transparent means of justifying an adequate sample. IMPLICATIONS FOR PRACTICE: Providing clear justification for the sample size within descriptive quantitative research demonstrates a robust research approach and optimises resource use.
Source: Nurse Researcher
Institution: University of Wollongong
Language: English
Subfield: Sociology and Political Science
Field: Social Sciences
Domain: Social Sciences
Open Access status: hybrid
OpenAlex ID: W4408417039