Box-and-Whisker Plots

Exploring Quartiles

Lower Quartile (Q1), Upper Quartile (Q3), Median (Q2)

And the Winner Is?—Parts 1 and 2

Modified Box Plots and Outliers

IQR—interquartile range—range of middle 50% of the data

Box goes from Q1 to Q3—Q2 is inside the box

Outliers are half of a box to the left Q1 or to the right of Q3

Whiskers do not extend to outliers