Why is ANCOVA often used in situations that involve nonequivalent control groups?
Answer to relevant QuestionsWhat is a covariate? In general, if p is the number of predictor variables and k is the number of groups for the outcome variable in a DA, how many different discriminant functions can be obtained to differentiate among groups? (This question ...In words, what null hypothesis is tested by the Box M value on the SPSS GLM printout for a MANOVA? Do you want this Box M test to be statistically significant? Give reasons for your answer. If Box M is statistically ...What is the difference between α and standardized α? Why does it make sense to sum z scores rather than raw scores across items in some situations? One way to interpret a reliability coefficient (often an r value) is as the proportion of variance in X scores that is stable across occasions of measurement. Why do we interpret r (rather than r2) as the proportion of ...
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