Box plots and quartiles (Year 7)

Quartiles (Q1, median, Q3), range and the interquartile range (IQR) divide a data set, and a box plot shows them all in a single picture. Exercises live under the German Klasse 7 (Quartile and Boxplots are explicit KMK Klasse 7 data content); EN introduces box plots later and gets an introduction article only.