Question

Twenty college students experience the effects of alcohol on reaction time. they perform very basic timed responses in a driving simulator both before and after consuming several alcoholic beverages. the researcher collects a reaction time result for each of the 20 students before and after intoxication, for a total of 40 measures. what are the degrees of freedom for this study

Answer 1

I believe the degrees of freedom in this case is 19. As I understand N is the number of participants as there are 20 students. Subtract one for statistical purposes puts that number at 19. The other option might have to deal with the total number of variables however I believe N is the basis here.