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Tytuł:
Approximate bias for first-order autoregressive model with uniform innovations. Small sample case
Autorzy:
Nouali, Karima
Fellag, Hocine
Powiązania:
https://bibliotekanauki.pl/articles/729836.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
autoregressive model
bias
outlier
uniform distribution
Opis:
The first-order autoregressive model with uniform innovations is considered. The approximate bias of the maximum likelihood estimator (MLE) of the parameter is obtained. Also, a formula for the approximate bias is given when a single outlier occurs at a specified time with a known amplitude. Simulation procedures confirm that our formulas are suitable. A small sample case is considered only.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2002, 22, 1-2; 15-26
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Critical Discourse Analysis of RT news headlines on Venezuela’s post-coup crisis in 2019-2020
Autorzy:
Matselyukh, Ihor
Powiązania:
https://bibliotekanauki.pl/articles/40223383.pdf
Data publikacji:
2023
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
CDA
headlines
presuppositions
implicatures
agency
bias
Opis:
This article researches the biased content of the propagandistic channel RT through the prism of Critical Discourse Analysis (CDA). It attempts to uncover the linguistic means of creating biased content in RT headlines that cover the Venezuela’s post-coup crisis of 2019-2020. It offers a CDA approach to the systemic bias in the headlines of 375 news stories featured on one of the most tendentious webcasters, the Russian state news provider RT. The current CDA focuses on presuppositions and implicatures, back- and fore-grounding, agency, lexis, punctuation, and briefly on other figurative linguistic means in the headlines and traces their relative recurrence that might form a pattern.
Źródło:
Linguistics Beyond and Within; 2023, 9; 95-111
2450-5188
Pojawia się w:
Linguistics Beyond and Within
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association between adjustment latitude and sickness presence – A panel study of Swedish employees
Autorzy:
Johansson, Gun
Gustafsson, Klas
Marklund, Staffan
Powiązania:
https://bibliotekanauki.pl/articles/2177243.pdf
Data publikacji:
2015-04-13
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
bias
work place
sickness behaviour
questionnaires
Sweden
Opis:
Objectives This study is analyzing the unexpected reversed or lacking association between high adjustment latitude and sickness presence by examining whether it is due to confounding. Material and Methods Questionnaires were sent in 2004 and 2005 to a cohort of individuals aged 25–50 years, selected from the Statistics Sweden’s register of the Swedish population. Information from 2397 individuals who answered both questionnaires was analyzed by the use of logistic regression analysis. Results The odds ratio for sickness presence among the individuals with a low adjustment latitude compared to those with high adjustment latitude was 1.7 (range: 1.4–2.2). This increased likelihood was almost entirely unaffected in the analysis of potential confounders. Conclusions If the reversed association between adjustment latitude and sickness presence does not reflect confounding, it may be due to reporting bias, which may cause problems in research on sickness presence. We argue that more detailed studies are needed to explore the different sources of possible reporting problems.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 3; 507-518
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Noise and bias - some controversies raised by the book 'Noise: A Flaw in Human Judgment', written by Daniel Kahneman, Olivier Sibony, Cass R. Sunstein
Autorzy:
Szreder, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/2082251.pdf
Data publikacji:
2022-06-30
Wydawca:
Główny Urząd Statystyczny
Tematy:
noise
bias
mean squared error
statistical inference
Opis:
The paper reviews and discusses the statistical aspects of the phenomenon called 'noise' which Daniel Kahneman, the Nobel Prize winning psychologist, and his colleagues present in their new book entitled 'Noise: A Flaw in Human Judgment'. Noise is understood by the authors as an unexpected and undesirable variation present in people's judgments. The variability of judgments influences decisions which are made on the basis of those judgments and, consequently, may have a negative impact on the operations of various institutions. This is the main concern presented and analyzed in this book. The objective of this paper is to look at the relationship between bias and noise - the two major components of the mean squared error (MSE) - from a different perspective which is absent in the book. Although the author agrees that each of the two components contributes equally to MSE, he claims that in some circumstances a reduction of noise can make accurate inference not less, but more difficult. It is justified that the actual impact of noise cannot be accurately determined without considering both bias and noise simultaneously.
Źródło:
Przegląd Statystyczny; 2022, 69, 1; 39-49
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Class of Estimators of Finite Population Mean Using Incomplete Multi-Auxiliary Information
Autorzy:
Srivastava, Meenakshi
Garg, Neha
Powiązania:
https://bibliotekanauki.pl/articles/466065.pdf
Data publikacji:
2013
Wydawca:
Główny Urząd Statystyczny
Tematy:
bias
mean square error
multi-auxiliary information
Opis:
In this paper, a class of estimators is considered for estimating the mean of the finite population utilizing available incomplete multi-auxiliary information. Some special cases of this class of estimators are considered. The approximate expressions for bias and mean square error of the suggested estimators have also been derived and theoretical results are numerically supported.
Źródło:
Statistics in Transition new series; 2013, 14, 2; 201-216
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Darwin’s Greatest Secret Exposed: Response to Grzegorz Malec’s De Facto Fact Denying Review of My Book
Autorzy:
Sutton, Mike
Powiązania:
https://bibliotekanauki.pl/articles/553335.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Instytut Filozofii
Tematy:
Darwin
Matthew
misrepresentation
bias
fact denial
historic revisionism
Opis:
Grzegorz Malec’s “There Is No Darwin’s Greatest Secret”, a review of my book Nullius in Verba: Darwin’s Greatest Secret, takes one extremely minor finding from my book and, despite his best efforts, manages to disconfirm just one of thirty examples of that minor finding. He then takes that one disconfirmed mere minor example and presents it as evidence that he has disconfirmed all the original major findings in my book. By so doing, his deceptive review goes far beyond the counter-academic deviance of mere cherry picking, it is more a case of gross misrepresentation to the point of de facto fact denial amounting to historic revisionist behaviour.
Źródło:
Filozoficzne Aspekty Genezy; 2016, 13; 287-296
2299-0356
Pojawia się w:
Filozoficzne Aspekty Genezy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robustness of estimation of first-order autoregressive model under contaminated uniform white noise
Autorzy:
Nouali, Karima
Powiązania:
https://bibliotekanauki.pl/articles/729652.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
autoregressive model
bias
MSE
robustness
generalized Beta distribution
Opis:
The first-order autoregressive model with uniform innovations is considered. In this paper, we study the bias-robustness and MSE-robustness of modified maximum likelihood estimator of parameter of the model against departures from distribution of white noise. We used the generalized Beta distribution to describe these departures.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2009, 29, 1; 53-68
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ cech populacji i środowiska na dokładność i precyzję wyników symulacji lotniczej inwentaryzacji zwierzyny
Effects of population and habitat characteristics on the accuracy and precision of wildlife aerial surveys results
Autorzy:
Witczuk, J.
Pagacz, S.
Powiązania:
https://bibliotekanauki.pl/articles/979294.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
bias
drone
simulations
thermal infrared
variability
wildlife monitoring
Opis:
Estimation of population abundance is one of the most difficult tasks in wildlife management. In case of forest−dwelling ungulates, none of the currently available survey methods is satisfying in terms of accuracy, precision, and cost−effectiveness. Therefore, we propose a new method of ungulate monitoring based on distance sampling and using unmanned aerial vehicles equipped with thermal infrared cameras. The method is potentially more reliable and cost−effective than conventional survey techniques. It also allows for aerial surveys in the dark when animals are most active. However, the method needs to be tested before wide−scale implementation in wildlife management practice. While the effects of sampling design and effort on accuracy and precision of abundance estimates are well recognized, the importance of population and habitat characteristics is often overlooked by wildlife managers. We used simulations to assess the effects of population size, animal aggregation, and habitat−depended detection probability on the accuracy and precision of wildlife aerial survey results. We created 1000 virtual populations defined by population density (2−22 individuals/100 ha), mean group size (1−6 individuals), and probability of animal detection during surveys (proportional to canopy cover, 30−60%). Animals were distributed on a virtual study area (5000 ha) according to randomly generated density distribution. Each population was subjected to 25 simulated surveys using the same design (39 transects grouped in three 2.0×2.5 km blocks). The transects covered 12% of the entire study area. We used conventional distance sampling to estimate abundance and generalized linear models to assess the effect of each parameter on the accuracy and precision of estimates. The estimation accuracy was mostly affected by the probability of detection (B=–0.75) and, to a lesser degree, by aggre− gation (B=–0.25) and population size (B=0.09). Precision was influenced by the aggregation (B=0.32) and population size (B=–0.26), while detection probability had a weaker effect (B=–0.11). Observed significant differences in quality of abundance estimates derived by the same survey design, but with differing population and habitat characteristics, indicate that each survey requires an individual approach. It is impossible to formulate general recommendations, e.g. concerning flight plan or area coverage. To achieve the required level of precision, while minimizing the survey costs, it is necessary to test alternative survey designs with the aid of computer simulations.
Źródło:
Sylwan; 2020, 164, 07; 560-567
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Disqualification of en employee of a public administration authority in the European Union Member States
Autorzy:
Kmiecik, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/28861135.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
administrative proceedings
impartiality
bias
close persons
consanguinity
affinity
Opis:
One of the rules contained in the Code of Good Administrative Behavior adopted in 2001 by the European Parliament is the principle of impartiality and independence (Article 8). The presence of this rule, despite its non-binding nature, prompted the author to examine – using the method of comparative law analysis – whether the EU Member States have regulated this issue in their legal systems – and if so, to what extent and how. The basic institution serving the implementation of this principle is the disqualification of an employee of the authority from participation in the proceedings in situations where their impartiality seems to be at risk. Not all EU countries explicitly provide for such an institution. Among the legal systems that contain it, only some regulate the entirety of issues related to it: the grounds for disqualification, the procedure for disqualification and the consequences of it, as well as the appealability of orders taken in this matter and the consequences of violating the provisions on disqualification. Regulations of individual issues differ in the degree of detail. This applies primarily to the reasons for the disqualification of an employee of the authority. The most important reason for the disqualification of employees (except when they or their spouse are a party to the proceedings) is the consanguinity or affinity between them and the party. However, the ranges of such ties resulting in automatic disqualification of an employee, adopted in EU member states, differ significantly. The second area of significant difference is the consequences of the potentially biased employee’s participation in the proceedings. The solutions adopted in this regard in legislation and jurisprudence depend on how the main purpose of the provisions concerning the disqualification of an employee is perceived: as strengthening the public’s trust in the executive, or as a fair settlement of the matter.
Źródło:
Ruch Prawniczy, Ekonomiczny i Socjologiczny; 2023, 85, 2; 109-126
0035-9629
2543-9170
Pojawia się w:
Ruch Prawniczy, Ekonomiczny i Socjologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improved separate ratio and product exponential type estimators in the case of post-stratification
Autorzy:
Lone, Hilal A.
Tailor, Rajesh
Powiązania:
https://bibliotekanauki.pl/articles/465656.pdf
Data publikacji:
2015
Wydawca:
Główny Urząd Statystyczny
Tematy:
finite population mean
post-stratification
bias
mean squared error
Opis:
This paper addressed the problem of estimation of finite population mean in the case of post-stratification. Improved separate ratio and product exponential type estimators in the case of post-stratification are suggested. The biases and mean squared errors of the suggested estimators are obtained up to the first degree of approximation. Theoretical and empirical studies have been done to demonstrate better efficiencies of the suggested estimators than other considered estimators.
Źródło:
Statistics in Transition new series; 2015, 16, 1; 53-64
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A General Family of Dual to Ratio-Cum-Product Estimator in Sample Surveys
Autorzy:
Singh, Rajesh
Kumar, Mukesh
Chauhan, Pankaj
Sawan, Nirmala
Smarandache, Florentin
Powiązania:
https://bibliotekanauki.pl/articles/465772.pdf
Data publikacji:
2011
Wydawca:
Główny Urząd Statystyczny
Tematy:
Family of estimators
auxiliary variables
bias
mean-squared error
Opis:
This paper presents a family of dual to ratio-cum-product estimators for the finite population mean. Under simple random sampling without replacement (SRSWOR) scheme, expressions of the bias and mean-squared error (MSE) up to the first order of approximation are derived. We show that the proposed family is more efficient than usual unbiased estimator, ratio estimator, product estimator, Singh estimator (1967), Srivenkataramana (1980) and Bandyopadhyaya estimator (1980) and Singh et al. (2005) estimator. An empirical study is carried out to illustrate the performance of the constructed estimator over others.
Źródło:
Statistics in Transition new series; 2011, 12, 3; 587-594
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiplicative method for reduction of bias in indirect digital measurement result
Autorzy:
Muravyov, S. V.
Zlygosteva, G. V.
Borikov, V. N.
Powiązania:
https://bibliotekanauki.pl/articles/221726.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bias
error reduction technique
shunt ohmic resistance
indirect measurement
Opis:
The error reduction technique, based on inverse transformation, for a shunt active resistance measurement using an ammeter and voltmeter is considered. When computing a corrected reading only multiplicative operations on two measurement results are used, namely squaring and division. The proposed method allows to increase resistance measurement accuracy by about two orders of magnitude what has been validated by both theoretical and experimental outcomes.
Źródło:
Metrology and Measurement Systems; 2011, 18, 3; 481-489
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An expert discussion on male and female experiences of conversion to Islam – socio-pedagogical implications in the European context
Autorzy:
Katarzyna, Gorak-Sosnowska,
Gabriela, Bartoszewicz, Monika
Powiązania:
https://bibliotekanauki.pl/articles/890367.pdf
Data publikacji:
2018-07-25
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
Islam
conversion
bias
social 'othering'
prison
rejection
religion
Europe
Opis:
This paper is a non-conventional academic paper based on a live discussion organized by the Polish expert on Saudi women’s issues, Professor Anna Odrowaz-Coates (2015, 2016), which took place in The Maria Grzegorzewska University in Warsaw, in June 2018. Two participating experts are known for their conflicting points of view on issues of security and integration of Muslims in Europe. In this exchange of viewpoints, they focussed on the issue of conversion to Islam in Poland and the UK, drawing upon multiple field research experiences they encountered. The main points of reference deal with the conversion of British prisoners whilst in prison and that of Polish women of diverse backgrounds. The impact of new media on the formation of public opinion, dissemination of faith and radicalization is also considered. The expert debate makes a significant contribution towards the socio-cultural and political discussion on culture clash versus coherence, integration and stability in a European context. It also concerns the use of new communication technology for the preservation of peace, radicalization and the elevation of moral panic
Źródło:
International Journal of Pedagogy, Innovation and New Technologies; 2018, 5(1); 44-49
2392-0092
Pojawia się w:
International Journal of Pedagogy, Innovation and New Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of product of two population means by multiauxiliary characters under double sampling the non-respondents
Autorzy:
Khare, B. B.
Sinha, R. R.
Powiązania:
https://bibliotekanauki.pl/articles/1193073.pdf
Data publikacji:
2019-08-30
Wydawca:
Główny Urząd Statystyczny
Tematy:
product
bias
mean square error
auxiliary characters
non-response
Opis:
This paper considers the problem of estimating the product of two population means using the information on multi-auxiliary characters with double sampling the non-respondents. Classes of estimators are proposed for estimating P under two different situations [discussed by Rao (1986, 90)] using known population mean of multi-auxiliary characters. Further, this problem has been extended to the case when population means of the auxiliary characters are unknown and they are estimated on the basis of a larger first phase sample. In this situation, a class of two phase sampling estimators for estimating P is suggested using multi-auxiliary characters with unknown population means in the presence of non-response. The expressions of bias and mean square error of all the proposed estimators are derived and their properties are studied. An empirical study using real data sets is given to justify the theoretical considerations.
Źródło:
Statistics in Transition new series; 2019, 20, 3; 81-95
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Voting Advice Applications as tools for researching and influencing voters: agenda setting and framing in European VAAs
Autorzy:
Lorenc, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1075491.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
European Parliament elections
Voting Advice Applications
agenda setting
bias
framing
Opis:
Voting Advice Applications are getting more and more popular throughout Europe and a lot of research prove that they have effects both on turnout and decisions of the electorate. This paper brings up the issue of possible agenda setting and framing effects which occur during the process of statements choice and construction in four European VAAs. Its aim is to check whether the statements are well-balanced or whether they suggest users a certain ideology, which is vital because if such an ideological bias is present in the Voting Advice Applications, it may influence the voters’ political decisions. The research also checks whether the statements focus on the European levels of elections or include also internal political conflicts as well as what the main topics covered by the VAAs are. The outcomes prove that the bias in the medium of Voting Advice Applications is noteworthy, especially when it comes to pro-/anti-European Union dimension. The research also proves that there are a lot of statements which did not focus on the European level of the election as well as shows a map of dominant topics present in all European VAAs.
Źródło:
World Scientific News; 2019, 129; 72-84
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 41

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