Can someone explain to us non-mathematically inclined people what the number mumbo jumbo means?
It means that if you torture the data long and hard enough, it will eventually confess what you want.
The trick in comparing several plans is to come up with a a fair and FIXED method by which all plans are evaluated the same and the outcomes give you the kind of result you were looking for in a specific plan.
My guess would be is that the same methodology was not used on all three plans or that there are a lot of ‘footnotes’ variances between the three.