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2016

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Articles 2041 - 2070 of 21483

Full-Text Articles in Social and Behavioral Sciences

A Comparison Of Usual T-Test Statistic And Modified T-Test Statistics On Skewed Distribution Functions, Wooi K. Lim, Alice W. Lim Nov 2016

A Comparison Of Usual T-Test Statistic And Modified T-Test Statistics On Skewed Distribution Functions, Wooi K. Lim, Alice W. Lim

Journal of Modern Applied Statistical Methods

When the sample size n is small, the random variable T= √n(\overline{X} – μ)/S is said to follow a central t distribution with degrees of freedom (n – 1), where \overline{X} is the sample mean and S is the sample standard deviation, provided that the data X ~ N (μ, σ2). The random variable T can be used as a test statistic to hypothesize the population mean μ. Some argue that the t-test statistic is robust against the normality of the distribution and claim that the normality assumption is not necessary. In this …

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Designing Of Bayesian Skip Lot Sampling Plan Under Destructive Testing, K. K. Suresh, S. Umamaheswari Nov 2016

Designing Of Bayesian Skip Lot Sampling Plan Under Destructive Testing, K. K. Suresh, S. Umamaheswari

Journal of Modern Applied Statistical Methods

Skip-lot sampling plan serves as a cost-effective technique to manage the cost of performing frequent product inspections. As a powerful tool within a real-time quality management system, the ability to collect data which an optimize skip-lot sampling parameters affords manufacturers the luxury of lowering inspection expenses in various manufacturing units. The good quality of product can be produced in continuous improvement of production process in excellent quality history for suppliers. The procedures and necessary tables are provided for finding the respective plans for which sum of producer and consumer risks are minimized with acceptable and limiting quality levels which accounts …

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Bayesian Inference For Median Of The Lognormal Distribution, K. Aruna Rao, Juliet Gratia D'Cunha Nov 2016

Bayesian Inference For Median Of The Lognormal Distribution, K. Aruna Rao, Juliet Gratia D'Cunha

Journal of Modern Applied Statistical Methods

Lognormal distribution has many applications. The past research papers concentrated on the estimation of the mean of this distribution. This paper develops credible interval for the median of the lognormal distribution. The estimated coverage probability and average length of the credible interval is compared with the confidence interval using Monte Carlo simulation.

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The Br2 – Weighting Method For Estimating The Effects Of Air Pollution On Population Health, Goran Krstic, Nikolas S. Krstic, Mauricio Zambrano-Bigiarini Nov 2016

The Br2 – Weighting Method For Estimating The Effects Of Air Pollution On Population Health, Goran Krstic, Nikolas S. Krstic, Mauricio Zambrano-Bigiarini

Journal of Modern Applied Statistical Methods

Uncertainties, limitations and biases may impede the correct application of concentration-response linear functions to estimate the effects of air pollution exposure on population health. The reliability of a prediction depends largely on the strength of the linear correlation between the studied variables. This work proposes the joint use of the coefficient of determination, r2, with the regression slope, b, as an improved measure of the strength of the linear relation between air pollution and its effects on population health. The proposed br2‑weighting method offers more reliable inferences about the potential effects of air pollution on …

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Estimating The Parameter Of Exponential Distribution Under Type Ii Censoring From Fuzzy Data, Iman Makhdoom, Parviz Nasiri, Abbas Pak Nov 2016

Estimating The Parameter Of Exponential Distribution Under Type Ii Censoring From Fuzzy Data, Iman Makhdoom, Parviz Nasiri, Abbas Pak

Journal of Modern Applied Statistical Methods

The problem of estimating the parameter of Exponential distribution on the basis of type II censoring scheme is considered when the available data are in the form of fuzzy numbers. The Bayes estimate of the unknown parameter is obtained by using the approximation forms of Lindley (1980) and Tierney and Kadane (1986) under the assumption of gamma prior. The highest posterior density (HPD) estimate of the parameter of interest is found. A Monte Carlo simulation is used to compare the performances of the different methods. A real data set is investigated to illustrate the applicability of …

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Preliminary Tests Of Normality When Comparing Three Independent Samples, Björn Lantz, Roy Andersson, Peter Manfredsson Nov 2016

Preliminary Tests Of Normality When Comparing Three Independent Samples, Björn Lantz, Roy Andersson, Peter Manfredsson

Journal of Modern Applied Statistical Methods

This paper uses simulation to explore the performance of a two-stage procedure where a preliminary Shapiro-Wilk test is used to choose between the ANOVA and Kruskal-Wallis tests as a three-sample location test. The results suggest that the two-stage procedure actually seems to be preferable when conducting such location tests.

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Limited Failure Censored Life Test Sampling Plan In Burr Type X Distribution, R. R. L. Kantam, M. S. Ravikumar Nov 2016

Limited Failure Censored Life Test Sampling Plan In Burr Type X Distribution, R. R. L. Kantam, M. S. Ravikumar

Journal of Modern Applied Statistical Methods

The Burr type X distribution is considered as a life time random variable of a product whose lots are to be decided for acceptance or otherwise on the basis of sample lifetimes drawn from the lot. The sample is divided into various groups in order to develop a group sampling plan in such a way that the life testing experiment is terminated as soon as the first failure in each group is observed. The acceptance criterion based on the theory of order statistics is proposed and is shown to be more economical than a criterion proposed in the earlier similar …

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Comparison Of Some Multivariate Nonparametric Tests In Profile Analysis To Repeated Measurements, Mehrdad Vossoughi, Shila Shahvali, Erfan Sadeghi Nov 2016

Comparison Of Some Multivariate Nonparametric Tests In Profile Analysis To Repeated Measurements, Mehrdad Vossoughi, Shila Shahvali, Erfan Sadeghi

Journal of Modern Applied Statistical Methods

Through Monte Carlo simulations, the performance of six multivariate nonparametric tests for testing the hypothesis of parallelism in profile analysis was studied. In conclusion, the tests based on ranks were as efficient as Hotelling's T2 under multivariate normal distribution. For the heavy tailed distribution, the tests based on signs performed best.

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On Generalizing Cumulative Ordered Regression Models, Robert W. Walker Nov 2016

On Generalizing Cumulative Ordered Regression Models, Robert W. Walker

Journal of Modern Applied Statistical Methods

We examine models that relax proportionality in cumulative ordered regression models. Something fundamental arising from ordered variables and stochastic ordering implies a partitioning. Efforts to relax proportionality also relax the ability to collapse an inherently multidimensional problem to a partitioning of the (unidimensional) real line. It is surprising and unfortunate to find that deviations from proportionality are sufficient to generate internal contradictions; undecidable propositions must exist by relaxing proportional odds without other relevant and significant changes in the underlying model. We prove a single theorem linking continuous support and partitions of a latent space to show that for these two …

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End Matter, Jmasm Editors Nov 2016

End Matter, Jmasm Editors

Journal of Modern Applied Statistical Methods

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Some Remarks On Rao And Lovric’S ‘Testing Point Null Hypothesis Of A Normal Mean And The Truth: 21st Century Perspective’, Bruno D. Zumbo, Edward Kroc Nov 2016

Some Remarks On Rao And Lovric’S ‘Testing Point Null Hypothesis Of A Normal Mean And The Truth: 21st Century Perspective’, Bruno D. Zumbo, Edward Kroc

Journal of Modern Applied Statistical Methods

Although we have much to agree with in Rao and Lovric’s important discussion of the test of point null hypotheses, it stirred us to provide a way out of their apparent Zero probability paradox and cast the Hodges-Lehmann paradigm from a Serlin-Lapsley approach. We close our remarks with an eye toward a broad perspective.

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Study Of The Left Censored Data From The Gumbel Type Ii Distribution Under A Bayesian Approach, Tabassum Naz Sindhu, Navid Feroze, Muhammad Aslam Nov 2016

Study Of The Left Censored Data From The Gumbel Type Ii Distribution Under A Bayesian Approach, Tabassum Naz Sindhu, Navid Feroze, Muhammad Aslam

Journal of Modern Applied Statistical Methods

Based on left type II censored samples from a Gumbel type II distribution, the Bayes estimators and corresponding risks of the unknown parameter were obtained under different asymmetric loss functions, assuming different informative and non-informative priors. Elicitation of hyper-parameters through prior predictive approach has also been discussed. The expressions for the credible intervals and posterior predictive distributions have been derived. Comparisons of these estimators are made through simulation study using numerical and graphical methods.

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Some Tests For Seasonality In Time Series Data, Eleazar Chukwunenye Nwogu, Iheanyi Sylvester Iwueze, Valentine Uchenna Nlebedim Nov 2016

Some Tests For Seasonality In Time Series Data, Eleazar Chukwunenye Nwogu, Iheanyi Sylvester Iwueze, Valentine Uchenna Nlebedim

Journal of Modern Applied Statistical Methods

This paper presents some tests for seasonality in a time series data which considers the model structure and the nature of trending curve. The tests were applied to the row variances of the Buys Ballot table. The student t-test and Wilcoxon Signed-Ranks test have been recommended for detection of seasonality.

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Hierarchical Bayes Estimation Of Reliability Indexes Of Cold Standby Series System Under General Progressive Type Ii Censoring Scheme, D. R. Barot, M. N. Patel Nov 2016

Hierarchical Bayes Estimation Of Reliability Indexes Of Cold Standby Series System Under General Progressive Type Ii Censoring Scheme, D. R. Barot, M. N. Patel

Journal of Modern Applied Statistical Methods

In this paper, hierarchical Bayes approach is presented for estimation and prediction of reliability indexes and remaining lifetimes of a cold standby series system under general progressive Type II censoring scheme. A simulation study has been carried out for comparison purpose. The study will help reliability engineers in various industrial series system setups.

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A New Estimator Of The Population Mean: An Application To Bioleaching Studies, Amer I. Al-Omari, Carlos N. Bouza, Dante Covarrubias, Roma Pal Nov 2016

A New Estimator Of The Population Mean: An Application To Bioleaching Studies, Amer I. Al-Omari, Carlos N. Bouza, Dante Covarrubias, Roma Pal

Journal of Modern Applied Statistical Methods

The multistage balanced groups ranked set samples (MBGRSS) method is considered for estimating the population mean for samples of size m = 3k where k is a positive real integer. It is compared with the simple random sampling (SRS) and ranked set sampling (RSS) schemes. For the symmetric distributions considered in this study, the MBGRSS estimator is an unbiased estimator of the population mean and it is more efficient than SRS and RSS methods based on the same number of measured units. Its efficiency is increasing in s for fixed value of the sample size, where s is the …

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A New Exponential Type Estimator For The Population Mean In Simple Random Sampling, Gamze Özel Kadilar Nov 2016

A New Exponential Type Estimator For The Population Mean In Simple Random Sampling, Gamze Özel Kadilar

Journal of Modern Applied Statistical Methods

This paper provides a new exponential type estimator in simple random sampling for population mean. It is shown that proposed exponential type estimator is always more efficient than estimators considered by Bahl and Tuteja (1991) and Singh, Chauhan, Sawan, and Smarandache (2009). From numerical examples it is also observed that proposed modified ratio estimator performs better than existing estimators.

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Bayesian Analysis Of Generalized Exponential Distribution, Saima Naqash, S. P. Ahmad, Aquil Ahmed Nov 2016

Bayesian Analysis Of Generalized Exponential Distribution, Saima Naqash, S. P. Ahmad, Aquil Ahmed

Journal of Modern Applied Statistical Methods

Bayesian estimators of unknown parameters of a two parameter generalized exponential distribution are obtained based on non-informative priors using different loss functions.

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Regularized Neural Network To Identify Potential Breast Cancer: A Bayesian Approach, Hansapani S. Rodrigo, Chris P. Tsokos, Taysseer Sharaf Nov 2016

Regularized Neural Network To Identify Potential Breast Cancer: A Bayesian Approach, Hansapani S. Rodrigo, Chris P. Tsokos, Taysseer Sharaf

Journal of Modern Applied Statistical Methods

In the current study, we have exemplified the use of Bayesian neural networks for breast cancer classification using the evidence procedure. The optimal Bayesian network has 81% overall accuracy in correctly classifying the true status of breast cancer patients, 59% sensitivity in correctly detecting the malignancy and 83% specificity in correctly detecting the non-malignancy. The area under the receiver operating characteristic curve (0.7940) shows that this is a moderate classification model.

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Efficient And Unbiased Estimation Procedure Of Population Mean In Two-Phase Sampling, Reba Maji, Arnab Bandyopadhyay, G. N. Singh Nov 2016

Efficient And Unbiased Estimation Procedure Of Population Mean In Two-Phase Sampling, Reba Maji, Arnab Bandyopadhyay, G. N. Singh

Journal of Modern Applied Statistical Methods

In this paper, an unbiased regression-ratio type estimator has been developed for estimating the population mean using two auxiliary variables in double sampling. Its properties are studied under two different cases. Empirical studies and graphical simulation have been done to demonstrate the efficiency of the proposed estimator over other estimators.

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A Generalization Of The Weibull Distribution With Applications, Maalee Almheidat, Carl Lee, Felix Famoye Nov 2016

A Generalization Of The Weibull Distribution With Applications, Maalee Almheidat, Carl Lee, Felix Famoye

Journal of Modern Applied Statistical Methods

The Lomax-Weibull distribution, a generalization of the Weibull distribution, is characterized by four parameters that describe the shape and scale properties. The distribution is found to be unimodal or bimodal and it can be skewed to the right or left. Results for the non-central moments, limiting behavior, mean deviations, quantile function, and the mode(s) are obtained. The relationships between the parameters and the mean, variance, skewness, and kurtosis are provided. The method of maximum likelihood is proposed for estimating the distribution parameters. The applicability of this distribution to modeling real life data is illustrated by three examples and the results …

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Rhode Island Current Conditions Index -- November 2016, Leonard Lardaro Nov 2016

Rhode Island Current Conditions Index -- November 2016, Leonard Lardaro

The Rhode Island Current Conditions Index

No abstract provided.

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Beyond The Matrix: Repository Services For Qualitative Data, Sebastian Karcher, Dessi Kirilova, Nic Weber Nov 2016

Beyond The Matrix: Repository Services For Qualitative Data, Sebastian Karcher, Dessi Kirilova, Nic Weber

Moynihan Institute of Global Affairs

The Qualitative Data Repository (QDR) provides infrastructure and guidance for the sharing and reuse of digital data used in qualitative and multi-method social inquiry. In this paper we describe some of the repository’s early experiences providing services developed specifically for the curation of qualitative research data. We focus on QDR’s efforts to address two key challenges for qualitative data sharing. The first challenge concerns constraints on data sharing in order to protect human participants and their identities and to comply with copyright laws. The second set of challenges addresses the unique characteristics of qualitative data and their relationship to the …

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Mountains Of Our Future Earth: Defining Priorities For Mountain Research, Erin H. Gleeson, Susanne Wymann Von Dach, Courtney G. Flint, Gregory B. Greenwood, Martin F. Price, Jörg Balsiger, Anne Nolin, Veerle Vanacker Nov 2016

Mountains Of Our Future Earth: Defining Priorities For Mountain Research, Erin H. Gleeson, Susanne Wymann Von Dach, Courtney G. Flint, Gregory B. Greenwood, Martin F. Price, Jörg Balsiger, Anne Nolin, Veerle Vanacker

Sociology, Social Work and Anthropology Faculty Publications

The Perth conferences, held every 5 years in Perth, Scotland, bring together people who identify as mountain researchers and who are interested in issues related to global change in mountain social-ecological systems. These conferences provide an opportunity to evaluate the evolution of research directions within the mountain research community, as well as to identify research priorities. The Future Earth Strategic Research Agenda provides a useful framework for evaluating the mountain research community's progress toward addressing global change and sustainability challenges. Using a process originally set up to analyze contributions to the 2010 conference, the abstracts accepted for the 2015 conference …

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Framing The Human Dimensions Of Mountain Systems: Integrating Social Science Paradigms For A Global Network Of Mountain Observatories, Courtney G. Flint Nov 2016

Framing The Human Dimensions Of Mountain Systems: Integrating Social Science Paradigms For A Global Network Of Mountain Observatories, Courtney G. Flint

Sociology, Social Work and Anthropology Faculty Publications

The Global Network of Mountain Observatories (GNOMO) is an international initiative seeking to increase communication and collaboration and align methodologies to assess commonalities and differences across the world's mountain landscapes. Oriented toward sustainable mountain development, GNOMO requires the integration of social and natural sciences, as well as a diverse array of stakeholder perspectives. This paper highlights challenges associated with integrating social sciences because of the inherent paradigmatic differences within the social sciences. The value orientations of mountain researchers, as well as the divergent societal and institutional values regarding mountains, create a need for new approaches to observing mountain landscapes. A …

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Increasing Engagement Of Students With Learning Disabilities In Mathematical Problem-Solving And Discussion, Rachel Lambert, Trisha Sugita Nov 2016

Increasing Engagement Of Students With Learning Disabilities In Mathematical Problem-Solving And Discussion, Rachel Lambert, Trisha Sugita

Education Faculty Articles and Research

Engagement in problem-solving and mathematical discussion is critical for learning mathematics. This research review describes a gap in the literature surrounding engagement of students with Learning Disabilities in standards-based mathematical classrooms. Taking a sociocultural view of engagement as participation in mathematical practices, this review found that students with LD were supported towards equal engagement in standards-based mathematics through multi-modal curriculum, consistent routines for problem-solving, and teachers trained in Mathematical Knowledge for Teaching. Using this small set of studies (7), we identify the need to deepen the engagement of students with LD in mathematical problem-solving and discussion. This review concludes with …

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The Logic Of Comprehensive Or Deep Emotional Change, Jeremy Barris Nov 2016

The Logic Of Comprehensive Or Deep Emotional Change, Jeremy Barris

Humanities Faculty Research

The article proposes an analogue of conceptual change in the context of comprehensive or deep emotional change and growth, and explores some aspects of its logic in that context. This is not to reduce emotions to concepts, but to say that concepts express the sense that is already inherent in experience and reality. When emotional states change so thoroughly that their applicable concepts become completely different, they shift from one logical structure to another. At the moment or phase when one conceptual structure transforms into another, two logically incompatible descriptions both apply to the same state at the same time. …

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Curating Collections By Curating Connections: How To Increase The Use And Usefulness Of Institutional Repository Content, Sean Lind Nov 2016

Curating Collections By Curating Connections: How To Increase The Use And Usefulness Of Institutional Repository Content, Sean Lind

Library Scholarship

This article discusses the creation and expansion of the institutional repository at Central Washington University as a depository for student scholarship.

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Political Polarization And Nisman’S Death: Competing Conspiracy Theories In Argentina, Leopoldo Rodriguez Ph.D., Shawn C. Smallman Ph.D. Nov 2016

Political Polarization And Nisman’S Death: Competing Conspiracy Theories In Argentina, Leopoldo Rodriguez Ph.D., Shawn C. Smallman Ph.D.

Journal of International and Global Studies

The death of Alberto Nisman, the chief investigator of the 1994 AMIA bombing in Argentina, unleashed conspiracy theories and significant political turmoil upon President Cristina Fernández. We study the case and trace two of these theories, asking what they tell us about the Argentine political system and what can be inferred with respect to other countries in Latin America. We confirm that nations with high levels of political polarization are fertile ground for the emergence of conspiracy theories and that domestic and international media play an important role in both giving credence to and spreading such theories.

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Boko Haram Terrorism In The Lake Chad Basin Region: Implications For Subregional Security, Abiodun Joseph Oluwadare Ph.D. Nov 2016

Boko Haram Terrorism In The Lake Chad Basin Region: Implications For Subregional Security, Abiodun Joseph Oluwadare Ph.D.

Journal of International and Global Studies

Terrorist activities in the Lake Chad Basin region of Nigeria, Niger, Chad and Cameroon, have impacted negatively on the security, socio-political and economic situations in the region. This paper investigates the evolution of insurgency and the factors leading to its growth in the region. It also examines its socio-political, economic and security implications. Nigeria, in the centre of the imbroglio, has had no respite from terrorist activities for a long time. Boko Haram has carried out many gun attacks and bombings in many strategic places, including the United Nations building in Abuja, the federal capital city. There have been similar …

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Transformation In Lifelong Education In Thailand, Suwithida Charungkaittikul Ed.D. Nov 2016

Transformation In Lifelong Education In Thailand, Suwithida Charungkaittikul Ed.D.

Journal of International and Global Studies

This research aims to evaluate the operational performance of the Office of NonFormal and Informal Education (ONIE) based on the Non-Formal and Informal Education Promotion Act B.E. 2551 during 2008–2012. The samples were selected from personnel of ONIE and learning networks by means of the multiple-stage sampling method. The research instruments are: (a) a form used for recording operational results of related non-formal and information education; (b) an interview form to observe factors influencing the performance of ONIE; (c) an evaluation form to observe the factors linked to the operational results; and (d) a form to evaluate the relevancy between …

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