Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_vufsw-slope-1137-en_vufsw-slope-1137-en
   name	vufsw-slope-1137-en
   section	inferential statistics/regression/slope
   type	schoice
   solution	FALSE, FALSE, TRUE, FALSE
   Type	conceptual
   Program	NA
   Language	English
   Level	statistical literacy

   Question

   A teacher is interested in the association (the relationship) between the number of hours that his students have studied (x) and their examination marks (y). He performs a regression analysis with these two variables. The slope of the regression line can be interpreted as …

   
   
   1. FALSE: The grade that a student receives when he or she has studied for one hour.
   2. FALSE: The average grade of all students in this sample.
   3. TRUE: The average increase / decrease of the grade if a student studies one extra hour.
   4. FALSE: None of the above
   
   

   Solution

   it is only the slope, without the intercept. Therefore it is not true. If it was true it was the slope plus the intercept. The right answer is: the average increase / decrease of the grade if a student studies one extra hour.

   If you want to know more about the regression line watch this  clip  and/or about the regression equation clip

   If you want to know more about regression models watch this clip .

   Levels of Difficulty
   Easy

   M&T Bivariate linear regression
   Bivariate linear regression

   M&T Multivariate linear regression
   Default value

   
   
   1. False
   2. False
   3. True
   4. False