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Research Article Open access CC BY 4.0

Sample Size Determination in Survey Research

Anokye M. Adam

Journal of Scientific Research and Reports · pp. 90–97 · Published 25 Jun 2020

10.9734/jsrr/2020/v26i530263

Abstract

Obtaining a representative sample size remains critical to survey researchers because of its implication for cost, time and precision of the sample estimate. However, the difficulty of obtaining a good estimate of population variance coupled with insufficient skills in sampling theory impede the researchers’ ability to obtain an optimum sample in survey research. This paper proposes an adjustment to the margin of error in Yamane’s (1967) formula to make it applicable for use in determining optimum sample size for both continuous and categorical variables at all levels of confidence. A minimum sample size determination table is developed for use by researchers based on the adjusted formula developed in this paper.

Sample size determination Yamane formula survey research Likert scale.

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