Nope. What you are describing are mathematical equations built into a model that can help us predict outcomes from certain conditions. However, the model is not reality. No matter how successful a mathematical model, that success is no evidence that the model's components are physical realities.
An easy example is the idea of average family sizes. We can take the average number of children per family - say, 2.3 - and accurately predict population growth, but that does not mean there exist fractions of children. Similarly, we can use Lorentz equations and have success with them, but that is no justification for believing that distances can shrink if we travel faster.
An even easier example is negative numbers. We can send our bank balances into overdraft, but that does not mean there exist negative dollar notes.
The accuracy of a mathematical model is no evidence that it's components describe real things.