Descriptor
| Data Analysis | 1 |
| Error of Measurement | 1 |
| Mathematical Models | 1 |
| Research Design | 1 |
| Statistical Distributions | 1 |
| Validity | 1 |
Source
| Journal of Educational… | 1 |
Author
| Hedges, Larry V. | 1 |
Publication Type
| Journal Articles | 1 |
| Reports - Evaluative | 1 |
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Peer reviewedHedges, Larry V. – Journal of Educational Statistics, 1981
Glass's estimator of effect size, the sample mean difference divided by the sample standard deviation, is studied in the context of an explicit statistical model. The exact distribution of Glass's estimator is obtained and the estimator is shown to have a small sample bias. Alternatives are proposed and discussed. (Author/JKS)
Descriptors: Data Analysis, Error of Measurement, Mathematical Models, Research Design
