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bootstrapping

Constructing a linear model of a judge's predictions of a criterion variable and then using the linear model instead of the judge to make further judgements or predictions. Such linear ...

bootstrapping

bootstrapping   Reference library

James Bogen

The Oxford Companion to Philosophy (2 ed.)

Reference type:
Subject Reference
Current Version:
2005
Subject:
Philosophy
Length:
106 words

... . An anti-holist account of theory-testing designed to show how evidence can count for or against a single hypothesis instead of the entire theory it belongs to. Bootstrapping construes the confirmation of a hypothesis, H , by evidence, E , as depending upon whether an instance of H can be deductively or probabilistically derived from E together with other hypotheses (‘bootstraps’) from the theory H belongs to. Unlike hypothetico-deductive accounts, bootstrapping does not have as a consequence that evidence which supports any hypothesis...

bootstrapping

bootstrapping   Quick reference

A Dictionary of Geology and Earth Sciences (5 ed.)

Reference type:
Subject Reference
Current Version:
2020

... In statistics, an approach to estimating the robustness or degree of error of a statistic when the distribution from which the statistic is drawn is unknown. An estimate of the distribution is constructed based on the data of the sample being analysed, often by repeatedly random sampling from the data itself and recalculating the statistic in order to produce a statistic...

bootstrapping

bootstrapping   Quick reference

A Dictionary of Electronics and Electrical Engineering (5 ed.)

Reference type:
Subject Reference
Current Version:
2018
Subject:
Science and technology, Engineering and Technology
Length:
556 words
Illustration(s):
4

... A technique used in a variety of applications in which a capacitor – the bootstrap capacitor – is used to provide 100% positive feedback for alternating currents across an amplifier stage of unity gain or less. Bootstrapping is used for control of the output signals by using the positive feedback to control the conditions in the input circuit in a desired manner. Bootstrapping is commonly used in circuits that generate a linear timebase, particularly in a sawtooth generator. A simple sawtooth generator consists of a capacitor that is charged by...

bootstrapping

bootstrapping   Quick reference

A Dictionary of Ecology (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

... In phylogenetics , a statistical procedure for testing the robustness of a particular tree topology . Columns are randomly selected from an alignment in order to construct a new alignment from which a new tree is calculated, and the process is repeated 100–1000 times. A bootstrap score is then assigned to each branch of the original tree. This score is equal to the number of randomly-generated trees containing that...

bootstrapping

bootstrapping   Quick reference

The Concise Oxford Dictionary of Mathematics (6 ed.)

Reference type:
Subject Reference
Current Version:
2021

...bootstrapping A process, due to Bradley Efron, of generating confidence intervals for statistics which has the advantage of not making assumptions about the underlying distribution of the population. It involves taking repeated random samples from the actual sample of observations which has been taken and producing confidence intervals for the statistic based on the distribution of the statistic in that process. Because it involves large numbers of repetitions of the resampling process it is dependent on computer...

bootstrapping

bootstrapping n.   Quick reference

A Dictionary of Psychology (4 ed.)

Reference type:
Subject Reference
Current Version:
2015

... n. Constructing a linear model of a judge's predictions of a criterion variable and then using the linear model instead of the judge to make further judgements or predictions. Such linear models consistently outperform the judges from whose judgements they are derived, because the coefficient weights are distillations of the judges' underlying principles, free of the extraneous variables that inevitably influence each of their specific judgements. This technique became widely known in the early 1970s under the leadership of the US psychologists...

bootstrapping

bootstrapping   Quick reference

A Dictionary of Gangs

Reference type:
Subject Reference
Current Version:
2019
Subject:
Social sciences, Sociology, Law
Length:
96 words

... When status offences are treated as criminal offences. Status offences rarely result in incarceration. However, females who violated the conditions of their sentence for a status offence were much more likely to be incarcerated compared to males who were found guilty of the same offences. Bootstrapping has been argued to be a contribution to the rise in female delinquency in the latter years of the twentieth century. This rise in delinquency corresponded with an increase in attention by researchers and law enforcement towards female gang...

bootstrapping operations

bootstrapping operations (USA)   Reference library

The Handbook of International Financial Terms

Reference type:
Subject Reference
Current Version:
2005

... operations (USA) . Another and early name for management buy-outs...

bootstrapping

bootstrapping  

Constructing a linear model of a judge's predictions of a criterion variable and then using the linear model instead of the judge to make further judgements or predictions. Such linear models ...
bootstrapping operations

bootstrapping operations  

Reference type:
Overview Page
(USA).Another and early name for management buy-outs.
actuarial prediction

actuarial prediction  

Any prediction of behaviour based on purely statistical information and not subjective judgement. It is characterized by mechanical processing of information, leading to probabilities representing ...
linear model

linear model  

A mathematical model represented by a linear equation of the form Y = b1X1 + b2X2 + … + bnXn, or by a system of such linear equations. The relationship between the variables in a linear equation is a ...
boot

boot  

Reference type:
Overview Page
A boot is the emblem of the English priest John Schorne (d. c.1315), centre of a popular cult, who was said to have trapped the Devil in his boot.boot and saddle a cavalry signal to mount, from an ...
bootstrap

bootstrap  

A computer-intensive resampling method for estimating the properties of a distribution while making minimal assumptions. In this respect it resembles the jackknife. The idea is simple. Suppose we ...
bootstrap

bootstrap   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
57 words

...1 (in computing) to restart a computer, often after a crash. 2 (in statistics) a form of randomization test that involves sampling data with replacement from the original data set, used to estimate the reliability of a result. Bootstrapping is used, for example, in phylogeny to assess the reliability of the branching structure in phylogenetic...

bootstrap analysis

bootstrap analysis   Quick reference

A Dictionary of Plant Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
50 words

...analysis ( bootstrapping ) A statistical technique for assigning measures of accuracy to statistical estimates through repeated random sampling and processing of the data. The technique is simple in principle, but to produce a reliable result the data must be sampled many times, and bootstrap analysis is computationally...

bootstrap

bootstrap   Quick reference

A Dictionary of Economics (5 ed.)

Reference type:
Subject Reference
Current Version:
2017
Subject:
Social sciences, Economics
Length:
61 words

...bootstrap A computer-intensive technique of re-sampling the data to obtain the sampling distribution of a statistic. The initial sample is treated as the population from which samples are drawn repeatedly and randomly, with replacement. These bootstrapped samples are used to compute a statistic, and the resulting empirical distribution of this statistic is interpreted as an approximation to the true sampling...

bootstrap

bootstrap   Quick reference

The Oxford Dictionary of Idioms (4 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Language reference
Length:
92 words

... 🅘 A bootstrap is sometimes sewn into the back of boots to help with pulling them on. This idiom has given rise to the computing term bootstrapping , meaning the process of loading a program into a computer by means of a few initial instructions which enable the introduction of the rest of the program from an input device. We now refer to the process of starting a computer as booting or...

linear model

linear model n.   Quick reference

A Dictionary of Psychology (4 ed.)

Reference type:
Subject Reference
Current Version:
2015

...X i represents a predictor variable , and the b i are regression coefficients or weights. If they are expressed as standardized regression coefficients , then they are represented by the Greek letter beta ( β ) instead of b and are called beta coefficients. See also bootstrapping...

bootstrap

bootstrap   Reference library

The Handbook of International Financial Terms

Reference type:
Subject Reference
Current Version:
2005

...as inputs to the following ones. Many financial valuation problems are susceptible to bootstrap methods rather than analytic solutions. An example of the bootstrap method would be deriving the zero-coupon yield curve from straight bonds . Hence the expression bootstrapping...

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