Sampling error, however, is oversimplified when presented as a single number in reports that may include subgroups, poll-to-poll changes, lopsided margins and results measured on the difference ...

Serious polling requires careful data collection and careful adjustment. It doesn't mean much to say your poll is a "probability sample" when your nonresponse rate is 90 percent.

While representative sampling is one of the most effective methods used to reduce error, it is often not enough to do so sufficiently on its own.

The weighting procedure also accounts for the fact that respondents with both landline and cell phones have a greater probability of being included in the combined sample and adjusts for household ...

Melbourne's boil water was rescinded Aug. 29; E. coli bacteria had been detected Aug. 28 during routine water samples.

We investigated sampling and non-sampling errors for size measurements (straight carapace length, straight carapace width, and mass) of hatchling Flatback Turtles, Natator depressus, from two study ...