UNDERSTANDING BOX AND WHISKER PLOTS by using the FISH TANK METHOD (convert to histogram to "see")
This video gives you a nice way to think about box and whisker plots. Please remember that you can never tell what is happening within the quartiles, but you can get a general feel... Box and whiskers are used to compare many distributions on the same axes. Seldomly would you use one to describe a single distribution.... GOOOD LUCK