Say What?

I can’t figure out if this is the worst statistic I’ve read this week, or just the most poorly phrased good statistic.  I’m leaning towards that first one:

“….more than half of students earning bachelor’s degrees at public colleges – 56 percent – are graduating with $22,000 of debt, on average.”  –Nancy Zimpher on CNN.com

If I’m reading this correctly, they tossed out everyone at private college, then anyone who didn’t graduate, then (most disturbingly) 44% of who was left?  Why did they get the boot?  I mean, if we’re just tossing out arbitrary numbers of students, can’t we get any average we want?

Nancy Zimpher, what are you up to???