Collect and sort the data from smallest to largest
Find the minimum value
Find the first quartile (Q1)
Find the median (Q2)
Find the third quartile (Q3)
Find the maximum value
Calculate the interquartile range if needed
Draw a number line
Mark Q1, median, and Q3 on the number line
Draw a box from Q1 to Q3
Draw a line inside the box at the median
Draw whiskers from the box to the minimum and maximum values
Check the plot for accuracy