Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uva-simple-linear-regression-788-en_uva-simple-linear-regression-788-en
   name	uva-simple-linear-regression-788-en
   section	Inferential Statistics/Regression/Simple linear regression
   type	schoice
   solution	FALSE, FALSE, TRUE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	5.2
   p-value	0.0083

   Question

   Research on the effect of the drug Koburol on patients with psychosis yields a positive correlation between the dose (x) of Koburol and how well the patient feels (y). The test on the slope parameter indicates that the relationship is significant. The researchers note that there are three different age groups of patients: 21-25, 26-30 and 31-35 years. These three groups are depicted in circles, triangles and diamonds. Then the researchers create a scatterplot of the data. This figure indicates

   

   
   
   1. FALSE: Regression to the mean
   2. FALSE: Bivariate correlation
   3. TRUE: Simpson’s paradox
   
   
   1. Regression to the mean: Incorrect
   2. Bivariate correlation: Incorrect
   3. Simpson’s paradox: Correct