Cruise Ships: Secret Gym Membership Pipeline?

Real correlation, fake causation

To turn this r ≈ 93% (positive) relationship between Global Cruise Ship Passengers and US Gym and Health Club Members into an actual scientific finding, you would need a plausible mechanism, controlled experiments, and replication across independent datasets. We have none of those. We have a chart that goes up at roughly the same rate twice.

That is the whole game of spurious correlations: the math is fine, the meaning is missing. Two lines can rise together because the population grew, because both phenomena are downstream of the same cultural shift, or because the universe has a sense of humor. Picking the comedic interpretation is the only honest move.

Any expert quote on this page is fictional and intended for entertainment.