Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-ANCOVA-872-en_uu-ANCOVA-872-en
   name	uu-ANCOVA-872-en
   section	Inferential Statistics/Parametric Techniques/ANOVA/ANCOVA
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Conceptual
   Program
   Language	English
   Level	Statistical Reasoning

   Question

   What is a reason to include a covariate in your ANOVA?

   
   
   1. FALSE: To increase the within-group error variance.
   2. FALSE: Because you are interested in the interaction between the covariate and the dependent variable.
   3. FALSE: Because you are interested in the interaction between the covariate and the independent variable.
   4. TRUE: To decrease the within-group error variance.
   
   

   Solution

   One reason for including a covariate in an ANOVA is that within-group error variance gets smaller.