Pick a common happening, devolpe an explanation for it, and describe an experiment i could perform to test your explanation

In this question, you need to define a common happenings in your daily life and then try to determine what is the reason of it and conduct an experiment why it happened and how to describe this kind of happenings.
Common happenings : You sleep late at night
Develop a theory : You’re going to think for a way to get sleep early
Experiment to describe : Observe the things that you do and you eat in the morning. Determine those days when you sleep early and you sleep late. Determine the possible causes.

The best description is: . nobody has any idea what q is.