That is the number UM would withhold from her paycheck. It's not a particularly fantastic health plan either; it's simply fine, and would cover Sarah, her spouse, and her 1 child.
Post-docs are somewhat modestly compensated affairs. But this is still a full-time job at a premier institution -- the 18th best university in the world, according to the U.S. News list. So the sort of funny thing about this is that, depending on the level of Sarah's retirement savings withdrawals, tax withholdings, life insurance, disability insurance, etc., if she DID get the health insurance for her family, I think it would be possible for her to achieve a take-home pay of zero from this university.
Again, we're not going to do this. Fortunately I have health insurance for us already.
But it really might be a nice absurdist exercise to get that paycheck with all zeroes printed on it. You could frame the paycheck in a nice gilt frame and save it for when the toddler grows up. Print a caption that says, "Full-time tier-1 university job with benefits, America, 2009." Put it in his hope chest!