Purplemath. Mean, median, and mode are three kinds of "averages". There are many "averages" in statistics, but these are, I think, the three most common, and are certainly the three you are most likely to encounter in your pre-statistics courses, if the topic comes up at all. The American Academy of PAs is the national professional society for PAs and advocates and educates on behalf of the profession and the patients PAs serve. Learn about membership, our national conference, and more. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Omrani on amoxicillin substitute over the counter: the same active ingredient, but some people respond differently to different brands The resources on this site should not be used as a substitute for professional medical care or advice. Users with questions about a personal health condition should consult with a qualified healthcare professional. For information on how to view files, please view the FAQ on viewing PDF files.. The majority of our forms are fillable. If you do not see the input fields on your screen, click the "Highlight Existing Fields" button in top right-hand corner above the form.