An experiment is to be conducted using an environmentally safe electronic deterrent
system to study the effectiveness of deterring woodpeckers from damaging trees. The
electronic system can be set to four frequencies to deter the woodpeckers. The
researchers will determine the adverse reaction of the woodpeckers to the electronic
deterrent by starting with trees with no holes and counting the number of holes after
one week of using the deterrent. There are 48 woodpeckers available for the
experiment, and the researchers will use 12 birds for each frequency of the electronic
deterrent. For this experiment, identify the treatments, experimental unit, and
response variable. (4 points)