Data Science, Statistics, Analytics, Experiment, Causality.
are deemed too risky and you are only allowed to do an experiment on, say, 20% of the user base. When it makes sense to have a low, medium, and high settings, keep the 80% “untouchable” as all 0 (medium setting) while equally splitting the 20% into -1 and +1 (low and high setting) groups. This way