Some New York Stock Exchange analysts believe that 24-hour trading on the stock exchange is the wave of the future. As an initial test of this idea, the New York Stock Exchange opened two after-hour “crossing sections” in the early 1990s and studied the results of these extra-hour sessions for one year.
a. State an independent variable that could have been used for this study.
b. List at least two levels, or classifications, for this variable.
c. Give a dependent variable for this study.