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Little Green Book

APPLICATIONS OF ANALYSIS OF COVARIANCE

Four applications of analysis of covariance are presented below. The discussion is nontechnical in nature, and intended to provide a sense for the type of situations in which analysis of covariance has been and can be utilized. The applications discussed include both observational and experimental studies. Feierabend and Feierabend (1972) report on an observational study relating the rate of social change to the level of permissiveness-coerciveness of a political regime. The final analysis of the study is a one-way analysis of covariance utilizing data from seventy-six countries over the post World War II period. The dependent variable is the rate of socioeconomic change, a combined rate of change index based on the pooled standard scores of annual measures of change on selected variables (caloric intake, urbanization, radios, and primary education). The categorical independent variable is the degree of permissiveness-coerciveness; three levels based on the composite ratings of three factors (presence ...

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