Negatively Skewed Distribution
A negatively skewed distribution is one in which the tail of the distribution shifts towards the left side,i.e., towards the negative side of the peak. It is also called a left skewed distribution. In this case, the tail on the left side is longer than the right tail. The mean value in this situation lies at the left side of the peak value. A left skewed distribution occurs because the mass of the distribution is shifted towards the right, which means that most of the values occur on the right side of the negatively skewed distribution curve.
Read more at Buzzle: http://www.buzzle.com/articles/types-of-skewed-distribution-with-real-life-examples.html