Because ^β0β^0\hat{\beta}_0 and ^β1β^1\hat{\beta}_1 are computed from a sample, the estimators themselves are random variables with a probability distribution — the so-called sampling distribution of the estimators — which describes the values they could take on over different samples.
I'm sure this makes sense to people with a great deal of statistical knowledge and experience, but if you're aiming for a less sophisticated audience, you might want to rethink this sentence. I don't think the predicate clause is as self-evident as you make it seem and adding more clarity to this sentence will help readers.