On: Dumb people don't know they are dumb. Is there a simple explanation for this?

[anamax]

-1000, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100

average of entries 0, 10 of 11 entries above average

I'll bet that the typical college prof believes that a small fraction of her "peers" rate -1000 or worse.

[gwc → anamax]

"above average" in this context usually means median, not mean - i.e. "in the top 50%"