I am in a Psychology Statistics class, and this weeks discussion is to explain and give an example of "the mean of

I am in a Psychology Statistics class, and this weeks discussion is to explain and give an example of "the mean of

sampling distribution". I can explain it using my textbook, but am struggling to come up with an example. My classmates have used age, height , GPA scores, so I need to have a more original example. If you could just help me think of a scenario that I could use to explain the process, I would be so grateful.