Organizational Research: Determining Appropriate Sample ...

Information Technology, Learning, and Performance Journal, Vol. 19, No. 1, Spring 2001 43 Organizational research : Determining Organizational research : Determining Appropriate Sample Size in Survey ResearchAppropriate Sample Size in Survey research James E. Bartlett, IIJames E. Bartlett, II Joe W. KotrlikJoe W. Kotrlik Chadwick C. HigginsChadwick C. Higgins The determination of Sample size is a common task for many Organizational researchers. Inappropriate, inadequate, or excessive Sample sizes continue to influence the quality and accuracy of research . This manuscript describes the procedures for Determining Sample size for continuous and categorical variables using Cochran s (1977) formulas.

using the fourth method. A researcher typically needs to estima te the variance of scaled and categorical variables. To estimate the variance of a scaled variable, one must determine the inclusive range of the scale, and then divide by the number of standard deviations that would include all possible values in the ran ge, and then square this ...

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