If you're looking for real-world examples, then you should start with the articles listed, here.
The utility of this concept becomes much clearer when you consider real-world examples.
A real-world example of using stratified sampling would be for a political survey.
Again, real-world examples from personal experience provide a study that is both gripping and insightful.
Actual real-world example I picked up on a forum.
A real-world example is the idea of paradox: something cannot be both true and false.
Somalia, from 1991 to 2006, is cited as a real-world example of a stateless society and legal system.
This facility was built by students in the vocational program, as a real-world example of construction.
Now that we have explored the basics, it's time for a real-world example.
It is generally claimed that all patterns need at least some existing real-world examples.