its when you make a general statement about something then you set out to prove or disprove your statement. example -

All granny smith apples contain 10 grams of natural sugar is a hypothesis statement

then you find ways to measure the sugar content say like boiling it all down then running sugar test on the plain apple sauce mixture boiling did to it.

just pick any general idea that has to do with the topic of the class, if its psychology write down a general psychology statement

then set out to prove or disprove your statement.