Problem: The results from Lab 1 showed that people have different kinds of microbes on their skin. Furthermore, an individual can only wash her hands in one way, i.e. she cannot be part of both the control and experimental groups. Taken together, this means that results from students in the experimental group are not directly comparable to results from the control group. Lab 2 - Hand Washing 14 4. Can you think of a way to get results that CAN be compared to each other? Hint: this involves adding a step to your experiment.