Traci thinks that instrumental music played in the office will increase the productivity of workers at the office. she creates two groups of 50 workers each and assigns each group the same task(in this case, they are asked to staple a set of papers). group a has instrumental music playing while they work. group b does not have any music playing for them. after and hour, traci counts how many stacks of papers rack group has made. group a made 2,113 stacks. group b made 1,587 stacks.