Is the Universe Random or Not?

The first test was in 1972 originally done with photons. You can do this kind of experiment with any sort of quantum object where you can create entanglement so that they have to like follow some overall constraint. And if at the end you get a certain number of times them both being spin up or spin down it means that the universe is random. That's what gives you these enhanced mathematical probabilities. All right well I think maybe the next question then should be have people actually done this experiment?