ERIC Number: ED121603
Record Type: RIE
Publication Date: 1975
Reference Count: 0
Additional Considerations in Determining Sample Size.
Levin, Joel R.; Subkoviak, Michael J.
Levin's (1975) sample-size determination procedure for completely randomized analysis of variance designs is extended to designs in which antecedent or blocking variables information is considered. In particular, a researcher's choice of designs is framed in terms of determining the respective sample sizes necessary to detect specified contrasts of a given magnitude with given Type I and Type II errors. A solution is provided for dealing with real-world considerations in which errors of measurement cannot be neglected. A worked example presents an instance wherein a blocking strategy is clearly advantageous assuming infallible measuring instruments, but not when the same instruments are granted fallibility. (Author/SD)
Publication Type: Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: Wisconsin Univ., Madison. Dept. of Educational Psychology.
Note: Paper presented at the Annual Meeting of the American Educational Research Association (San Francisco, California, April 19-23, 1976)