EDA can be done with a computer or by hand. You can try bar graphs, scatterplots, line graphs, and any other graphs that might help you visualize patterns in your data. Use the flow chart to help you decide which statistical test to use to test your hypotheses. Remember that you need to make sure your data fit the assumptions of any test you decide to use. For example, if you are going to use a t test, your data should be normally distributed.
Most biologists get some help when it comes to statistical analyses.
This page has listings for many other sites that deal with statistics. Some of these sites are geared to undergraduates and other statistics beginners. Others are more advanced.