Oooohkay, @anon73444976. Yes, you are techincally correct that the exact line is not averaging 100 readings, it is indeed just adding 100 readings together to be divided by 100 just outside of the loop. (I don't know of a better way to do that.)
Am I being dense or are you being pedantic?
Either way, this post is not about my code, but a way to improve the UI/UX.
Cheers,
Dax.