Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_vufsw-correlations-1298-en_vufsw-correlations-1298-en
   name	vufsw-correlations-1298-en
   section	inferential statistics/parametric techniques/correlations
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	conceptual
   Program	NA
   Language	English
   Level	statistical literacy

   Question

   

   In the partial correlation matrix below, including zero-order correlations, we examined the extent to which preference for healthy foods, such as granola or fish (HEALTHYFOOD), is correlated with education (EDUCATION) and income (INCOME). The data are from representative survey data among people between the ages of 20 and 40. Education is measured as last attained or current level of education (1-7: a higher score means a higher level of education). Income is measured in euros per month. The assumption is that education in causal order precedes income. Healthy eating (HEALTHYFOOD) is a continuous scale from 0 to 1.

   

   Education was measured on a scale of 1-7 and income in euros per month. What happens to the covariance and correlation if education and income were converted to z-scores?

   
   
   1. TRUE: Only the covariance changes
   2. FALSE: Only the correlation changes
   3. FALSE: Both the covariance and the correlation change
   4. FALSE: Both the covariance and correlation do not change
   
   
   1. True
   2. False
   3. False
   4. False