1. Imagine that I am interested in studying the influence of alcohol on the driving ability of Ohio
drivers. We find a sample of 200 Ohio drivers and randomly assign them to either drink alcohol
or not before going into a driving simulator. We then measure the number of driving errors and
find that the group drinking alcohol had an average of 10 errors during the driving simulation,
whereas the group that did not drink alcohol only averaged 3 errors. Identify each of the
following (2 points):
a. What is the independent variable?
b. What is the dependent variable?
c. What is the Scale of Measurement for the dependent variable?
d. What type of study is this?