In this lesson, your students will learn how to identify the five-number summary of a set of data and use the five-number summary to construct a box plot. Your students will also gain an informal introduction to the concept of an outlier. Upon completion of this lesson, your students will be able to use a five-number summary to construct a box plot as well as identify the median, quartiles, interquartile range, and presence of outliers in a given box plot. Your students will also be able to describe the shape of a distribution by inspecting a box plot display of data.
This lesson includes detailed instructional suggestions that can easily be adapted to your students’ needs, a student assignment and answer key, and larger images of graphs and tables to be displayed in class. You can use this lesson to introduce box plots to students in the middle grades (grades 6 – 9).