Yes, you can predict the amount of randomness in a normally distributed system. If you could not, standard deviations would have no meaning, and all branches of

Yes, you can predict the amount of randomness in a normally distributed system. If you could not, standard deviations would have no meaning, and all branches of statistics built thereon would be false. In chaos theory, the best you can hope for is strange attractors. Unfortunately, economics doesn't even seem to have these.