Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_vufgb-dummies-011-en_vufgb-dummies-011-en
   name	vufgb-dummies-011-nl
   section	Inferandtial Statistics/Regression/Dummies, Inferandtial Statistics/Parametric Techniques/ANOVA/ANCOVA, Inferandtial Statistics/Regression/Equation
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	Calculation
   Program
   Language	Dutch
   Level	Statistical Thinking

   Question

   In an ANCOVA model with interaction, the following regression equation is estimated, where $x_{1}$ is the covariate and z is the Factor with two levels (dummy variable): $\hat{y} = 10+2x_{1}+3z-4x_{1}z$.

   Calculate the predicted y score for a score 5 on the covariate and a score 1 on the dummy variable.

   
   
   1. TRUE: 3
   2. FALSE: 17
   3. FALSE: 19
   4. FALSE: 43
   
   

   Solution

   Enter $x_{1} = 5$ and $z = 1$ gives:

   Predicted $y = 10+2 \times 5+3 \times 1-4 \times 5 \times 1 = 10+10+3-20 = 3$.

   
   
   1. Correct
   2. Incorrect
   3. Incorrect
   4. Incorrect