I've noticed that (low- to mid-level, at least) business, marketing, and other folks are generally a whole lot looser with their numbers than developers are. That is, they'll toss around measures that aren't meaningful—and not just in some quibbling sense of "well technically maybe these could possibly be wrong" but truly are very likely to be way off the mark—because they didn't properly control for confounders or are clearly measuring the wrong thing or whatever. They'll assign meaning to measures that could easily have nothing to do with what they're saying they mean, or mean the opposite.

... but this usually goes over just fine. Rarely questioned. I think if they didn't do this they'd be just as bad off as developers, if not worse due to (again, generalizing) having a worse understanding of how to measure things well.