Tables are given for the rapid estimation of h, the effect size index for the difference between independent proportions, and of q, the effect size index for the difference between independent correlation coefficients. The tables are accurate to three decimal places and may be used conveniently in conjunction with tables and charts of power and sample size. Formulas for power and sample size estimation are also presented.
Get full access to this article
View all access options for this article.
References
1.
Cohen, J. (1962). The statistical power of abnormal-social psychological research. Journal of Abnormal and Social Psychology, 65, 145-153.
2.
Cohen, J. (1977). Statistical power analysis for the behavioral sciences (rev. ed.). New York: Academic Press.
3.
Eisenhart, C. (1947). Inverse sine transformation of proportions. In C. Eisenhart, M. W. Hastay, & W. A. Wallis, (Eds.), Selected techniques of statistical analysis for scientific and industrial research production and management engineering (pp. 395-416). New York: McGraw-Hill.
4.
Haseman, J. K. (1978). Exact sample sizes for use with the Fisher-Irwin test for 2 x 2 tables. Biometrics, 34, 106-109.
5.
Hornick, C. W. and Overall, J. E. (1980). Evaluation of three sample size formulae for 2 x 2 contingency tables. Journal of Educational Statistics, 5, 351-362.
6.
Trattner, M. H. and O'Leary, B. S. (1980). Sample sizes for specified statistical power in testing for differential validity. Journal of Applied Psychology, 65, 127-134.
7.
Ury, H. K. (1981). Continuity-corrected approximations to sample size or power when comparing two proportions: Chi-squared or arc sine?Statistician, 30, 199-203.
