But, days with no combat are explicitly excluded from the poll.
Neither does the poll ask whether you design encounters, or use the XP budget to create encounters, or adventures, or anything. It's just straight-up, "If I sat at your table and observed every time that someone tries to inflict lethal damage on an (N)PC or monster, called it a combat, and calculated the effective difficulty of those combats relative to DMG guidelines, where would my observations sit relative to those DMG guidelines?"
I don't use DMG guidelines myself, and I don't have all that much combat in my games, but I do occasionally compute encounter days and difficulties after the fact, and I've noticed certain patterns about where things tend to average out: a very few, infrequent but very large Deadly combats, and a smattering of small-to-medium combats that I think of as mostly exploration and social events instead of existential threats even if my players choose to socialize with Fireball instead of the Friends cantrip. So I'll call that closest to 2-3 "combats" per day, and guesstimate the mean as something close to 110% of the daily encounter budget (ranging from 10% of the daily XP budget in recent sessions, to 300% to 2300% of the daily XP budget in other previous sessions).
That's what this poll is asking about. And I agree that the mean isn't very useful summary statistic--posted descriptions are actually better. Thank you for responding.