Here are data on the lengths of male and female roaches (in mm). Your job is to find out if there is a difference between male and female roaches.

males : 10.8 15.3 15.1 9.9 13.4 13.1 16.7 10.9 14.6 16.9 13.9 12.0 13.5

females : 16.7 16.3 12.8 16.9 15.1 12.8 18.7 18.3 8.6 13.6 15.3 16.2 13.4

It's up to you to figure out what the best procedure is, what kind of hypotheses to use, which to use, what test to use, and so on. Make sure you follow all the appropriate steps. You should probably use R as you'll get done much quicker. Remember to very clearly state your results in writing