Find the median.
Since the data is already listed in ascending order, find the middle number.
Find the quartiles.
Find the medians of the upper half and the lower half of the ordered set of data.
Make a box plot of the data.
Use the eTool below to make a box plot.
Click the link at right for the full version of the eTool: 6-95 HW eTool (Desmos)