A homeowner in the Northern Hemisphere is considering installing photovoltaic (PV) panels on the roof of the home to help provide electricity for the home. The homeowner has read conflicting reports on which compass direction the panels should face to maximize the amount of electricity (in kWh) that the panels can produce.

(a) The homeowner plans to design an experiment to determine the direction of the panels for maximal
electricity production.
(b) Identify the independent variable in the experiment.
(c) Identify the dependent variable in the experiment.
(d) Identify a reasonable hypothesis for the experiment.
(e) Describe one variable that was not discussed that could affect the results of the study.