This is true, but ’80%′ here means only 16⁄20. A result this extreme is theoretically p=0.005 to show up out of 20 coin flips...if you treat it as one-tailed, and ignore the fact that you’ve cherry-picked two specific material-pair options out of 21. Overall, I’d be very surprised if this wasn’t simply randomness.
I admit it’s cheating a bit the spirit of the challenge, but in practice, I guess it’s the round amount that makes me suspicious that it might be intentional. But it’s true there doesn’t seem to be a broader materials related pattern, so it may just be as you say.
This is true, but ’80%′ here means only 16⁄20. A result this extreme is theoretically p=0.005 to show up out of 20 coin flips...if you treat it as one-tailed, and ignore the fact that you’ve cherry-picked two specific material-pair options out of 21. Overall, I’d be very surprised if this wasn’t simply randomness.
I admit it’s cheating a bit the spirit of the challenge, but in practice, I guess it’s the round amount that makes me suspicious that it might be intentional. But it’s true there doesn’t seem to be a broader materials related pattern, so it may just be as you say.