What do you know about an experiment ?
Start with a hypothesis
Ok whats an example of a hypothesis?
If i raise the temperature in this class to 99 degrees, your test scores will drop
Ok how do we test it? We raise the temperature who raises the temperature? me i’m the researcher ( teacher )
independent variable - temperature dependent - test scores
So can we just give a test and raise the temperature and say that’s it? No We need a control We have one regular group test in regular temperature We have one experimental group test in 99 degree temperature
How do we determine who goes in what group? Random? How do we do random picking ? Names in a hat? Alternate? We wanna randomize somehow. If we had a test and the right side of the room averaged a 95 and the left side of the room averaged a 55 on the first test We know the right side is testing better than the left side So it would’nt be random if the right side was one group and the left side was the other that is a biased sample so you have to think about how you randomize it.
A good random chance would mean that anyone in the class had equal chance to be in either group.