| − | A '''probability distribution''' describes how a series of data is approximately laid out. The most commonly seen probability distribution is the so-called '''normal distribution''' which has a bell-shaped curve. A lot of data occurring in nature fits the normal distribution. | + | A '''probability distribution''' describes how a series of data is approximately laid out. The most commonly seen probability distribution is the [[normal distribution]] which has a bell-shaped curve. A lot of data occurring in nature fits the normal distribution. |