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| Expectancy Tables | 2 |
| Mathematical Formulas | 2 |
| Goodness of Fit | 1 |
| Nonparametric Statistics | 1 |
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| Sampling | 1 |
| Statistical Analysis | 1 |
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Peer reviewedHornick, Chris W.; Overall, John E. – Journal of Educational Statistics, 1980
Estimates of sample size requirements for 2 X 2 tables, derived from three approximate formulae, were evaluated by comparison with exact calculations. Although different, the estimates derived from all three formulae were judged adequate for most practical purposes, with the most accurate results being obtained from Cohen's formula. (Author/JKS)
Descriptors: Expectancy Tables, Mathematical Formulas, Nonparametric Statistics, Sampling
Peer reviewedHopkins, Kenneth D. – Journal of Experimental Education, 1979
Formulas are derived for computing the chi-square statistic from proportions or percentages, both for tests of goodness of fit and association. Advantages of the new formulas are given, as are some examples. (Author/MH)
Descriptors: Expectancy Tables, Goodness of Fit, Mathematical Formulas, Percentage
