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Violation of Homogeneity of Variance Assumption in the Integrated Moving Averages Time Series Model.
Download full textGullickson, Arlen R.; And Others – 1971
This study is an analysis of the robustness of the Box-Tiao integrated moving averages model for analysis of time series quasi experiments. One of the assumptions underlying the Box-Tiao model is that all N values of alpha subscript t come from the same population which has a variance sigma squared. The robustness was studied only in terms of…
Descriptors: Analysis of Variance, Evaluation Methods, Hypothesis Testing, Mathematical Models
Peer reviewedLohnes, Paul R. – American Educational Research Journal, 1972
It may be useful in evaluation research to employ the class as the unit of analysis, assessing its syntality by a vector of distribution cumulants or indices for each of several input tests administered. (Author)
Descriptors: Classes (Groups of Students), Evaluation Methods, Input Output Analysis, Mathematical Models
Peer reviewedCorder-Bolz, Charles R. – Educational and Psychological Measurement, 1978
Six models for evaluating change are examined via a Monte Carlo study. All six models show a lack of power. A modified analysis of variance procedure is suggested as an alternative. (JKS)
Descriptors: Analysis of Covariance, Analysis of Variance, Educational Change, Error of Measurement
Madhere, Serge – 1986
One of the most appropriate quasiexperimental approaches to compensatory education is the regression-discontinuity design. However, it remains underutilized, in part because of the need to clarify the link between the mathematical model and administrative decision-making. This paper explains the derivation of a program efficiency index congruent…
Descriptors: Compensatory Education, Cutting Scores, Effect Size, Elementary Education
