Some articles on biased sample, sample, biased:
... In theoretical computer science, a small-bias sample space (also known as -biased sample space, -biased generator, or small-bias probability space) is a probability distribution that fools parity functions ... In other words, no parity function can distinguish between a small-bias sample space and the uniform distribution with high probability, and hence, small-bias sample ... The main useful property of small-bias sample spaces is that they need far fewer truly random bits than the uniform distribution to fool parities ...
... A biased sample causes problems because any statistic computed from that sample has the potential to be consistently erroneous ... Almost every sample in practice is biased because it is practically impossible to ensure a perfectly random sample ... degree of underrepresentation is small, the sample can be treated as a reasonable approximation to a random sample ...
Famous quotes containing the words sample and/or biased:
“All that a city will ever allow you is an angle on itan oblique, indirect sample of what it contains, or what passes through it; a point of view.”
—Peter Conrad (b. 1948)
“Scientists are humantheyre as biased as any other group. But they do have one great advantage in that science is a self-correcting process.”
—Cyril Ponnamperuma (b. 1923)