Box Plot URL
Box plots use five different number summaries to represent the information portrayed. The minimum number is the smallest number in the groups, and the maximum number is the largest number in the group. The first quartile cuts off the first 25% of the data and the third quartile takes the last 25% of the data. The median lies in the middle, but it doesn't always have to be the mean of the information. In this graph, temperature is being measured over time. Each of the five number summaries aren't exactly evenly distributed among the graph.