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To make causal inferences from observed differences between groups based on varied levels of treatment, it is necessary to...?
A. Find significant differences between groups at at-least the .05 level
B. Use T-test or ANOVA procedures to conduct the analysis
C. Have random assignment of participants to treatment levels and control conditions as a basis of design, prior to conducting analysis
D. Deploy at least a quasi-experimental design

  • Statistics - ,


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