Exam 1

1. Metainformation

   Tag	Value
   file	Assumptions_uu-Homoscedasticity-023-en_uu-Homoscedasticity-023-en
   name	uu-Homoscedasticity-023-en
   section	Assumptions/Homoscedasticity
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Performing analysis
   Program
   Language	English
   Level	Statistical Literacy

   Question

   One of the conditions of a regression analysis is about “homoscedasticity.” Which graph is best to use to check this condition?

   
   
   1. FALSE: A scatterplot with the predictors on the X-axis and nurse stress scores on the Y-axis
   2. FALSE: A scatterplot with the residuals on the X-axis and nurse stress scores on the Y-axis
   3. FALSE: A scatterplot with the residuals on the X axis and nurse stress scores on the Y axis
   4. TRUE: A scatterplot with standardized-predicted nurse stress scores on the X-axis and the standardized residuals on the Y-axis
   
   

   Solution

   Homoscedasticity means that the spread in residuals for each X value is approximately equal. In other words, that the dispersion in residuals for each predicted value is about the same. You can check this condition with a scatterplot where you put the standardized predicted scores on the X-axis, and the standardized residuals on the Y-axis.