Our sample mirrors this estimate, with only 9.2% of underwater borrowers 90 days or more past due on their mortgage payments.

FORBES: Getting to Know Underwater Homeowners

From sample surveys, officials estimate the population at the end of 2009 to have been 1.33 billion.

ECONOMIST: China's ten-yearly census: The world's biggest headcount | The

This online survey is not based on a probability sample and therefore no estimate of theoretical sampling error can be calculated.

FORBES: Connect

Based on actual surveys and interviews with a random sample of debtors, the profs estimate that in 2003, at least 259, 000, or 15.7% of all bankruptcies, were really business-related.

FORBES: Small-Biz Bankrupts, Beware

We estimate that about 5 to 8 percent of a random sample of children have ADD.

NPR: Excerpt: 'Delivered from Distraction'

CNN's estimate of the number of Democrats in the voting age population as a whole indicates the sample is about 3 to 4 points more Democratic than the population as a whole, but also about 2 to 3 points more Republican than the population as a whole.

CNN: Poll: Debate watchers say Obama wins