My issue is that, during winters, the bedroom's CO2 raises to the 2000ppm levels. But I keep all doors open in this (small) apartment and not much changed. It's too cold to keep windows open like we do in the summer and it's nighttime so plants won't help.
I'm old enough that I got my Lean Six Sigma Green Belt certification and used Minitab (!!!) to do a statistical process control project on some investment banking back office process that was being automated.
Does anyone here even remember Minitab? You kids and your newfangled Python!
I got a six sigma green belt using minitab in ~2018. It's still in use and getting updates, for example they now provide an interface to python: https://pypi.org/project/mtbpy/
For the longest time, open source solutions were incomplete in the sense that all of them did x-bar/S/R and then usually never got to the more esoteric but handy stuff. Multivariate, even less support.