Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Twoway-ANOVA-856-en_uu-Twoway-ANOVA-856-en
   name	uu-Twoway-ANOVA-856-en.Rmd
   section	Inferential Statistics/Parametric Techniques/ANOVA/Twoway ANOVA
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Interpretating graph, Conceptual
   Program	SPSS
   Language	English
   Level	Statistical Reasoning

   Question

   An experiment focuses on the influence of practicing (Practiced) and background noise (Noise) on the understanding and insight of scholarly texts. Part of the SPSS output is shown below.

   

   Which figure could be a graphic representation of the analysis?

   

   
   
   1. FALSE: Figure D
   2. FALSE: Figure C
   3. FALSE: Figure B
   4. TRUE: Figure A
   
   

   Solution

   There is a large interaction effect but no large main effects. In figure B there is a strong effect of this because practiced students always score much lower than non-practiced students. In figure c there is no interaction because the lines are parallel. In figure d there is a strong effect of noise because pupils with a little noise always score strongly lower than pupils with a lot of noise. Figure A is therefore the right solution, there is interaction because the lines are not parallel at all, but there are no main effects because experienced and inexperienced students score equally high on average, and students experiencing little and a lot of noise also score approximately the same.