Exam 1

1. Metainformation

   Tag	Value
   file	Assumptions_uu-assumptions-203-en_uu-assumptions-203-en
   name	uu-assumptions-203-en
   section	Assumptions
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Conceptual
   Program
   Language	English
   Level	Statistical Literacy

   Question

   What assumption(s) can you check with a scatterplot (scatter plot of the X and Y variables)?

   
   
   1. FALSE: Linearity
   2. FALSE: Outliers
   3. FALSE: Homoscedasticity
   4. TRUE: All of the above
   
   

   Solution

   Using a scatterplot, we can assess by eye whether there is a linear relationship between X and Y. The assumption of homoscedasticity implies that the dispersion of residuals for each X value is equal. When this assumption is violated, the dispersion of residuals is not equal for all scores on the independent variable. In a scatterplot, outliers are visible and can thus be identifiedified.