Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_vufsw-equation-1022-en_vufsw-equation-1022-en
   name	vufsw-equation-1022-en
   section	inferential statistics/regression/equation
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	interpreting output
   Program	NA
   Language	English
   Level	statistical literacy

   Question

   If you were researching the effect of hours of training and attitude on the performance of a specific skill (e.g. the number of goals scored: performance), and the regression results give you the following regression equation, which of the following statements is true?
   performance = 1.23^* + 0.112 × attitude + 0.531^* × hours + 0.167^* × attitude × hours

   * indicates a statistically significant effect

   
   
   1. TRUE: When the athlete’s attitude is positive there is a positive significant relationship between hours of training and sports performance.
   2. FALSE: When the athlete’s attitude is positive there is a positive non-significant relationship between hours of training and sports performance.
   3. FALSE: When the athlete’s attitude is positive there is a negative significant relationship between hours of training and sports performance.
   4. FALSE: When the athlete’s attitude is positive there is a negative non-significant relationship between hours of training and sports performance.
   
   

   Solution

   performance = 1.23^* + 0.112 × attitude + 0.531^* × hours + 0.167^* × attitude × hours

   The effect of hours on performance is:

   (0.531 + 0.167*attitude). If attitude is positive, this number will always be positive. Since both the coefficient of the main effect of hours and the interaction effect are statistically significant, we expect the effect of hours to be always significant if attitude is positive.

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