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
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
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
Statistical benchmarking — In statistics, benchmarking is a method of using auxiliary information to adjust the sampling weights used in an estimation process, in order to yield more accurate estimates of totals.Suppose we have a population where each unit k has a value… … Wikipedia
Resampling (statistics) — In statistics, resampling is any of a variety of methods for doing one of the following: # Estimating the precision of sample statistics (medians, variances, percentiles) by using subsets of available data (jackknife) or drawing randomly with… … Wikipedia
oversampling — A departure from simple random sampling , in which the same sampling fraction is applied to all cases in the population being studied, so that an invariant one in 50 or one in 200 (for example) are selected for interview. Oversampling is the… … Dictionary of sociology
Magellan Data and Mapping Strategies — is a political polling firm based in Louisville, Colorado that provides data and information services to Republican Party candidates and conservative political organizations, as well as serving public affairs firms and businesses. The firm was… … Wikipedia
Consumer price index — CPI redirects here. For other uses, see CPI (disambiguation). A consumer price index (CPI) measures changes in the price level of consumer goods and services purchased by households. The CPI, in the United States is defined by the Bureau of Labor … Wikipedia
statistics — /steuh tis tiks/, n. 1. (used with a sing. v.) the science that deals with the collection, classification, analysis, and interpretation of numerical facts or data, and that, by use of mathematical theories of probability, imposes order and… … Universalium
CMA-ES — stands for Covariance Matrix Adaptation Evolution Strategy. Evolution strategies (ES) are stochastic, derivative free methods for numerical optimization of non linear or non convex continuous optimization problems. They belong to the class of… … Wikipedia
