Each person who washed his hands has one set of results. Make a bar graph of all the results from your group to compare the number of different kinds of colonies seen in each trial. Would you say your group's results support or refute your hypothesis? Why? A good scientist thinks critically and is always thinking of ways that experimental results may not suggest the hypothesis is correct. Look critically at your group's results and describe one way in which they do not support your hypothesis. Experiments are often repeated to ensure the accuracy and reproducibility of the results. What are two ways in which you could improve upon your experiment, if you were to repeat it?