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| Analysis of Variance | 1 |
| Case Studies | 1 |
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| Levin, Joel R. | 2 |
| Betz, M. Austin | 1 |
| Kratochwill, Thomas R. | 1 |
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Peer reviewedBetz, M. Austin; Levin, Joel R. – Journal of Educational Statistics, 1982
Logically consistent hypothesis-testing for factorial analysis of variance designs is proposed in the context of a hierarchical model. It is shown that all of the hypotheses associated with the traditional factorial model are conceptually independent and occupy the lowest levels of the hierarchy. (Author/JKS)
Descriptors: Analysis of Variance, Data Analysis, Hypothesis Testing, Models
Peer reviewedKratochwill, Thomas R.; Levin, Joel R. – Contemporary Educational Psychology, 1978
The promise of time-series designs for educational research and evaluation is reviewed. Ten time-series designs are presented and discussed in the context of threats to internal and external validity. The advantages and disadvantages of various visual and statistical data-analysis techniques are presented. A bibliography is appended. (Author/RD)
Descriptors: Case Studies, Data Analysis, Educational Research, Research Design
