To demonstrate how to make a boxplot on SPSS, I will be using the World.sav data set. Two methods will be shown.
Graphs à Interactive à Boxplot
Place the variable you are trying to measure on the y-axis slot:
Then choose what categories do you want box plots do you want the data to divided into, if necessary, and drag this variable into x-axis slot:
Select the appropriate information from your output window:
Graphs à Legacy Dialogs à Boxplot
Select Variables and hit the right arrow once selected.
Choose variable you want to group box plots into by selecting variable and placing it in on the category axis:
Select Boxplot graph from output window: