Sara Lilia pulled out four different CD's to find out which type helped her to finish her homework the fastest. The first CD was rock, the second reggaeton, the third classical, and the
fourth was cumbia. She chose a math assignment that required concentration. Sara Lilia used a
stopwatch with an alarm to make sure that she only listened to each CD for 5 minutes. Each
time the alarm went off, Sara Lilia recorded how many problems she was able to finish. At the
end of the experiment, she found that she was able to concentrate the most with the classical
music, then the rock, and the cumbia. She noticed that she did not concentrate much at all
with the reggaeton and felt like dancing and singing along instead of working.
A. Name the independent variable:
B. Name the dependent variable:
C. Name the control variable:
D. Was there a constant variable? If so, name it.