biased sampling

biased sampling
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English-Russian dictionary of computer science and programming. 2013.

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  • Sampling bias — In statistics, sampling bias is when a sample is collected in such a way that some members of the intended population are less likely to be included than others. It results in a biased sample, a non random sample[1] of a population (or non human… …   Wikipedia

  • Biased sample — A biased sample is a statistical sample of a population in which some members of the population are less likely to be included than others. If the bias makes estimation of population parameters impossible, the sample is a non probability… …   Wikipedia

  • Sampling (statistics) — Sampling is that part of statistical practice concerned with the selection of individual observations intended to yield some knowledge about a population of concern, especially for the purposes of statistical inference. Each observation measures… …   Wikipedia

  • Importance sampling — In statistics, importance sampling is a general technique for estimating the properties of a particular distribution, while only having samples generated from a different distribution rather than the distribution of interest. Depending on the… …   Wikipedia

  • Non-Sampling Error — A statistical error caused by human error to which a specific statistical analysis is exposed. These errors can include, but are not limited to, data entry errors, biased questions in a questionnaire, biased processing/decision making,… …   Investment dictionary

  • Correct sampling — During sampling of particulate materials, correct sampling is defined in Gy s sampling theory as a sampling scenario in which all particles in a population have the same probability of ending up in the sample [1]. The concentration of the… …   Wikipedia

  • Quota sampling — In quota sampling, the population is first segmented into mutually exclusive sub groups, just as in stratified sampling. Then judgment is used to select the subjects or units from each segment based on a specified proportion. For example, an… …   Wikipedia

  • Fisher's noncentral hypergeometric distribution — Probability mass function for Fisher s noncentral hypergeometric distribution for different values of the odds ratio ω. m 1 = 80, m 2 = 60, n = 100, ω = 0.01, ..., 1000In probability theory and statistics, Fisher s noncentral hypergeometric… …   Wikipedia

  • Race (classification of human beings) — The term race or racial group usually refers to the concept of categorizing humans into populations or groups on the basis of various sets of characteristics. [http://www.physanth.org/positions/race.html AAPA Statement on Biological Aspects of… …   Wikipedia

  • Statistical survey — Statistical surveys are used to collect quantitative information about items in a population. Surveys of human populations and institutions are common in political polling and government, health, social science and marketing research. A survey… …   Wikipedia

  • Wallenius' noncentral hypergeometric distribution — Introduction Probability mass function for Wallenius Noncentral Hypergeometric Distribution for different values of the odds ratio ω. m1 = 80, m2 = 60, n = 100, ω = 0.1 ... 20In probability theory and statistics, Wallenius noncentral… …   Wikipedia


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