5 percent of the routes (all of quartile 4 and most of quartile 3) is not enough to cover the costs of the mail delivered on those routes.
The mail delivered on these routes is delivered late.
mnli hypothesis: The mail delivered on these routes is delivered late. premise: 5 percent of the routes (all of quartile 4 and most of quartile 3) is not enough to cover the costs of the mail delivered on those routes.