I think that most students surveyed wake up at 6:00am because it seems like a reasonable time to wake up. It gives students at least an hour to get ready before the bus comes.
My hypothesis was incorrect because most students actually wake up at 6:30 based off of my data. I thought that most students would wake up at 6:00 because that gives them an hour before the bus comes. If I surveyed the whole school, then my hypothesis could change and my data would be a lot more trustworthy.