Regression testing can be used to test a system efficiently by systematically selecting the appropriate minimum set of tests needed to adequately cover a particular change.

Regression testing can be used not only for testing the correctness of a program, but often also for tracking the quality of its output.

Regression analysis producing statistically significant negative relationships indicates that two individuals can be less genetically alike than two random ones on average ( Hamilton 1970, Nature & Grafen 1985 Oxford Surveys in Evolutionary Biology ).

Regression towards the mean can be defined for any bivariate distribution with identical marginal distributions.

* Regression analysis includes a large group of methods that can be used to predict future values of a variable using information about other variables.

There are also programs specifically written to do curve fitting ; they can be found in the lists of statistical and numerical analysis programs as well as in: Category: Regression and curve fitting software.

* Regression tree analysis is when the predicted outcome can be considered a real number ( e. g. the price of a house, or a patient ’ s length of stay in a hospital ).

Regression techniques can be used to determine if a specific case within a sample population is an outlier via the combination of two or more variable scores.

* Regression of Weakly Correlated Data — How linear regression mistakes can appear when Y-range is much smaller than X-range

* R: The function for fitting a generalized linear model in R is glm (), and can be used for Poisson Regression

Regression to the mean in sports performance may be the reason for the “ Sports Illustrated Cover Jinx ” and the “ Madden Curse ”.

Regression toward the mean simply says that, following an extreme random event, the next random event is likely to be less extreme.

Regression analysis estimates what the average firm should be able to achieve.

Regression methods continue to be an area of active research.

* Regression test-to be performed on an existing operational product, to verify that existing functionality didn't get broken when other aspects of the environment are changed ( e. g., upgrading the platform on which an existing application runs ).

STATISTICA is customizable and may be used to call external code modules, including R. This collection of data mining and machine learning algorithms includes: Support Vector Machines, EM and k-Means Clustering, Classification & Regression Trees, Generalized Additive Models, Independent Component Analysis, Stochastic Gradient Boosted Trees, Ensembles of Neural Networks, Automatic Feature Selection, MARSplines, CHAID Trees, Nearest Neighbor Methods, Association Rules, and Random Forests.

Regression testing is any type of software testing that seeks to uncover new software bugs, or regressions, in existing functional and non-functional areas of a system after changes, such as enhancements, patches or configuration changes, have been made to them.

Regression is often useful.

" Infinite Causal Regression ", Philosophical Review, 1966.

Regression methods are important in econometrics because economists typically cannot use controlled experiments.

* Regression analysis, a statistical technique for estimating the relationships among variables.

Regression testing is an integral part of the extreme programming software development method.

* Regression – Attempts to find a function which models the data with the least error.

Regression is the situation in which a coastline moves in the direction of the sea.

Empirical models that attempt to estimate the public investment and economic growth link involve a wide variety including: the Cobb-Douglas production function ; a behavioral approach cost / profit function which includes public capital stock ; Vector Auto Regression ( VAR ) models ; and government investment growth regressions.

( 1988 ) " Five Hides in Ten Counties: a Contribution to the Domesday Regression Debate ", in: The Economic History Review, New series, Vol.

The concept of regression comes from genetics and was popularized by Sir Francis Galton during the late 19th century with the publication of Regression towards mediocrity in hereditary stature.

Regression toward the mean is a significant consideration in the design of experiments.

Regression inward speaks to the magnitude of the reliance on primitive forms of fantasy and self-containment, often of an autoerotic or even objectless nature.

Regression backwards to the safety of the womb is a unique schizoid phenomenon and represents the most intense form of schizoid defensive withdrawal in an effort to find safety and to avoid destruction by external reality.

Regression of CIS effectively results in the progressive conversion of a malignant neoplasm to a benign one, to a localized area of normal or near-normal tissue, with or without associated scar tissue, which often forms secondary to apoptosis, necrosis, and fibrosis.

Regression is most often manifested after exposure to prolonged changes in the quality and intensity of environmental and / or immunological stimuli.

* Residuals and Influence in Regression, R. Dennis Cook, New York: Chapman and Hall, 1982.

Besides the lack of an adequate ethical dimension to the Governor's case, one can ask seriously whether our lead over the Russians in quality and quantity of nuclear weapons is so slight as to make the tests absolutely necessary.

Any alteration of one of these factors is distortion, although we generally use that word only for effects so pronounced that they can be stated quantitatively on the basis of standard tests.

Comparisons can also look at tests of trend, such as linear and quadratic relationships, when the independent variable involves ordered levels.

Whereas the structure is not symmetrical, various mode mixities can be introduced in these tests.

With modern instrumentation these tests are rarely used but can be useful for educational purposes and in field work or other situations where access to state-of-the-art instruments are not available or expedient.

The method tests the capability of mutagen in creating mutations that can result in a reversion back to a non-auxotrophic state so that the cells can grow on a histidine-free medium.

Computational fluid dynamics was started as an effort to solve for flow properties around complex objects and has rapidly grown to the point where entire aircraft can be designed using a computer, with wind-tunnel tests followed by flight tests to confirm the computer predictions.

As the user stories pass their acceptance criteria, the business owners can be sure of the fact that the developers are progressing in the right direction about how the application was envisaged to work and so it's essential that these tests include both business logic tests as well as UI validation elements ( if need be ).

A story can have one or many acceptance tests, whatever it takes to ensure the functionality works.

DNA microarray chip – some can do as many as a million blood tests at once

The tests currently available can detect mutations associated with rare genetic disorders like cystic fibrosis, sickle cell anemia, and Huntington's disease.

These tests can include ultrasounds of the head, x-ray computed tomography ( CAT scan ), electroencephalogram, HIV test, full blood count, thyroid function test, liver function test, urea and creatinine levels and if patient is on lithium, lithium levels are taken.

However, by identifying clusters of observable properties that are associated with core examples of clitics on the one hand, and core examples of affixes on the other, one can pick out a battery of tests that provide an empirical foundation for a clitic / affix distinction.

The spiritual teacher Meher Baba described dualism as consisting of the opposites of experience, which must become balanced before one can go beyond them: " Evolution from the standpoint of the Creator is a divine sport, in which the Unconditioned tests the infinitude of His absolute knowledge, power and bliss in the midst of all conditions.

Thus, the only logical possibilities are to accept non-Euclidean geometry as physically real, or to reject the entire notion of physical tests of the axioms of geometry, which can then be imagined as a formal system without any intrinsic real-world meaning.

( 1979 ) have shown that it can take 0. 5 seconds before a stimulus becomes part of conscious experience even though subjects can respond to the stimulus in reaction time tests within 200 milliseconds.

The differences in likelihood ratio between clinical tests can be used to prioritize clinical tests according to their usefulness in a given clinical situation.

Cutoff values for positive and negative tests can influence specificity and sensitivity, but they do not affect AUC-ROC.

How well something has been encoded in the memory can be measured by completing specific tests of retrieval.

Alertness in humans can be determined by many kinds of verbal and non-verbal tests ; activity in animals by observation, for example of wheel-running in rodents.