Definition: Box and Whisker Plots

A box-and-whisker plot shows a data set on a number line using the lowest value, the highest value, and the quartiles of the data. The five numbers that create the box-and-whisker plot are known as the five-number summary of the data set.

Definition: Identifying Outliers

Identifying outliers means finding data points in a dataset that are very different from the rest. These unusual points stand out because they are much higher or lower than most of the other data. Finding outliers helps in understanding unusual patterns, errors, or unique occurrences in the data.