Speaking as somebody with some background in statistics, I would suspect that most Statisticians would be surprised, and more than a little skeptical, of real-world data that didn’t contain “Natural Variability” (the title of the section you are quoting) or similar ‘noise’. This variability or noise is, after all, the precise reason why we have statistical models, and statisticians.
If you had bothered to read the rest of that section, you would have seen that the authors give detailed discussion of the effects of this variability, including this chart:
Given this pre-existing discussion, I cannot help but consider your question to be sealioning.