Scientific method has four parts, observation, hypothesis, experiment, and theory. The ways I would use this method is by first starting with observation. Observation is the first step in which I will collect data. In this case I saw two commercials on TV about hair removal systems. Brand A states it lets you go weeks without shaving. Brand B states to remove hair quicker and longer. The second step would be the hypothesis; this is where I would put together any possible interpretations from observations. For example I would list the pros of both brands, like usage times and durability. The third step would-be to experiment. When performing an experiment it will help the validity of my hypothesis. In my experiment I would buy both brand A and