Determining Sample Size for Research Activities

Educational and Psychological Measurement - Tập 30 Số 3 - Trang 607-610 - 1970
Robert V. Krejcie1, Daryle W. Morgan2
1University of Minnesota, Duluth
2Texas A&M University;

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Tài liệu tham khảo

Small-Sample Techniques. The NEA Research Bulletin, Vol. 38 (December, 1960), p. 99.