Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Twoway-ANOVA-849-en_uu-Twoway-ANOVA-849-en
   name	uu-Twoway-ANOVA-849-en
   section	Inferential Statistics/Parametric Techniques/ANOVA/Twoway ANOVA
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Interpretating graph
   Program	SPSS
   Language	English
   Level	Statistical Reasoning

   Question

   A survey of a random sample of students on their willingness to demonstrate was conducted prior to recent student demonstrations. A researcher conducts an analysis of variance for DEMONSTRATION READiness (0 = no readiness through 100 = very high readiness) with the factors SEKSE and TRAINING. The distinguished groups are all approximately equal in size.

   

   Using the average chart shown, evaluate the following two statements. I. There is a main effect of TRAINING on DEMONSTRATION readiness. II. There is no interaction effect of SEKSExOPLEIDING on DEMONSTRATION READiness.

   
   
   1. FALSE: I is correct, II is correct.
   2. FALSE: I is not correct, II is correct.
   3. FALSE: I is not correct, II is not correct.
   4. TRUE: I is correct, II is not correct.
   
   

   Solution

   Theorem I is not correct We may assume that all groups are about the same size. Then we find mpedagogy = 30, meducation = 25 and mpsychology = 35 (see asterisks in the mean diagram). The average DEMONSTRATION READiness differs between courses. So there is a main effect of TRAINING on DEMONSTRATION READiness. Theorem II is not correct In the mean diagram, it can be seen that the lines are not parallel. The effect of TRAINING on DEMONSTRATION READiness is different for men than for women. Thus, there is an interaction effect of SEKSE×OPLEIDING on DEMONSTRATION READiness.