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Showing 1 to 20 of 20 for “"Wald test"”.
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An Examination of the Improved Wald Test for Differential Item Functioning Detection with Multiple Groups
… for establishing validity in psychometric testing. There is a vital need for simultaneously comparing multiple groups, evidenced by the widespread proliferation of international assessments in educational testing. Historically, DIF methods have been formulated to only address pairwise group …
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Ranking single nucleotide polymorphisms with support vector regression in continuous phenotypes
… polymorphisms (SNPs) over traditional chi-square tests in disease case studies [2]. In this investigation, ranking SNPs with support vector regression (SVR) was compared to the Wald test in predicting continuous phenotypes. SVR-ranked SNPs consistently outperformed the Wald test-ranked SNPs to …
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Phenotype prediction and feature selection in genome-wide association studies
… data and are evaluated for performance on test data. Three methods are used to rank SNPs by their correlation with the phenotype: the univariate Wald test, a multivariate, support vector machine (SVM) based technique, and a hybrid method where a subset of top ranked SNPs from the Wald test …
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Noma (Cancrum Oris) Risk Factors: Feasibility of an Individual Patient Data Meta-Analysis and the Development of a Data Collection Tool for Noma Studies
… Exact, p=1.000; OR: 0.959, 95% CI: 0.791, 1.144, Wald Test: p=0.645), the number of noma cases that author reported (Fisher’s Exact, p=0.294; OR: 0.993, 95% CI: 0.978, 1.001, Wald Test: p=0.360), or the region in which that author’s study was conducted (Fisher’s Exact, p=0.309). There was no …
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Assessing the attractiveness of cryptocurrencies in relation to traditional investments in South Africa
… were employed to analyse the data. The spanning test carried out was the multivariate ordinary least squares (OLS) regression Wald test. The research findings showed that the inclusion of cryptocurrencies in a portfolio of investments improves the efficient frontier of the portfolio of …
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Asymmetric Nonlinear Correlation between Cryptocurrencies and the Stock Market Performance in South Africa
… Distributed Lag (NARDL) model and the Wald test to explore these dynamics. The results indicate a significant asymmetric nonlinear correlation between cryptocurrencies and stock market indices. This asymmetric relationship suggests that cryptocurrencies may offer potential hedging …
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An investigation of fit measures for longitudinal network and attribute co-evolution models
… paper, including an extension of Snijders’ t-test to a Pseudo-Wald test statistic, an extension of Schweinberger’s score test for use in a co-evolution model, an entropy-based goodness-of-fit measure, and an R^2 goodness-of-fit measure for actor-based co-evolution models. Following the …
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The causal relationship between exports and economic growth: time series analysis for UAE (1975-2012)
… exports can have. In doing so, various unit root tests have been applied to examine the time-series properties of the variables, while the Johansen cointegration test is employed to test the existence of a long-run relationship between the variables. Moreover, the multivariate Granger causality …
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Nonlinear and Asymmetric Exchange Rate Pass-Through to Consumer Prices in South Africa
… and consumer inflation. This is portrayed by the Wald test results, which suggest the absence of a nonlinear asymmetric correlation between inflation and exchange rate. This is supported by a significant p-value (0.0000), less than 0.05. The policy suggestion is that the South African monetary …
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The determinants of self-employment relative to being a wage earner in Ladysmith, KZN
… determinants. The study used the Hosmer-Lemeshow test to assess goodness of fit and the Wald test to assess the contribution of individual predictors in the model. Supported by descriptive statistics and chi squared test, the logistic results showed a positive and meaningful relationship between …
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A Study of Relationships Between Family Members Using Familial Correlations
… case is presented. First, three likelihood based tests, namely the likelihood ratio test, Rao score test, and Wald test, and two more asymptotic tests which use Srivastava's estimator of the intraclass correlation coefficient are considered to test the null hypothesis of equality of the intraclass …
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On testing the change-point in the longitudinal bent line quantile regression model
… framework. Second, we propose a score-type test for hypothesis testing of the change-point problem using rank-based inference. The proposed test in this thesis has several advantages over the existing inferential approaches. Most importantly, it circumvents the difficulties of estimating …
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Optimal and Suboptimal Signal Detection-On the Relationship Between Estimation and Detection Theory
… consider a general binary and M-ary hypothesis testing problems with unknown parameters. In a hypothesis testing problem, we assume that the probability density function (pdf) of observation is given while some unknown parameters exit in the structure of the pdf and the set of unknowns under …
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Persönlichkeit und die Bereitschaft, bei Online-Auktionen zu bieten : Überprüfung eines Pfadmodells für das Internet-Auktionshaus eBay
… Residualmatrix, des Lagrange-Multiplier- und des Wald-Test theoriegeleitet durchgeführt wurden. Schließlich wurde ein partiell-rekursives Modell mit Fehlerterm-Korrelationen der intermittierenden Ebenen der Compound Traits akzeptiert, welches zusätzlich einen ebenenüberspringenden Parameter …
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Comparison of the Item Response Theory with Covariates Model and Explanatory Cognitive Diagnostic Model for Detecting and Explaining Differential Item Functioning
… detection power and Type I error rates of the Wald test and likelihood ratio (LR) test, and parameter recovery when ignoring subgroups, using the compensatory reparameterized unified model (C-RUM). Factors included sample size, DIF magnitude, DIF type, Q-matrix complexity, their interaction …
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Strategic behavior in risky competitive settings
… implications of mixed strategy equilibria are tested in the field using repeated observations on specific heterogeneous pairs of players, a situation that rarely repeats in real life. In this respect, I also study the effects of the usual practice of treating heterogeneous rivals as if they all …
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IDENTIFICATION OF RISK OF MAXILLARY SINUS PERFORATION IN ASSOCIATION WITH THE SINUS ANGLE
… as potential confounders. A chi-squared test and fisher’s exact test were used to determine the association between MIL sinus angle and perforation of the membrane. A multivariable regression analysis was used to test the confounders of age, gender, ethnicity, dentition status, and …
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The interplay between environmental social governance (ESG) performance, access to finance and growth in unlisted firms: Evidence from Eastern Europe and Central Asia Region
… theories to develop hypotheses, which are then tested, analysed, and either confirmed or refuted. This process helps to refine and expand theoretical understanding, allowing future researchers to further evaluate the findings empirically. The positivist perspective is particularly useful when a …
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The Competing Risks of Prepayment and Default on the Single-Family Mortgage Market
… ratio on the prepayment and default is also tested.</p> <p>By controlling other mortgage characteristics, such as loan size and loan age, the brief summary of results shows us the prepayment penalty has a negative effect on the prepayment decision. However, its effect in Detroit is …
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Μελέτες στην εφαρμοσμένη μακροοικονομετρία : Αιτιότητα κατά Granger σε πολλαπλούς ορίζοντες και μη-γραμμικές τάσεις σε μακροοικονομικές χρονολογικές σειρές
Η παρούσα διατριβή ασχολείται με δύο ιδιαιτέρως σημαντικά και διαχρονικά επίκαιρα ζητήματα στην ανάλυση χρονολογικών σειρών, τα οποία εντάσσονται, υπό ευρεία έννοια, στο πεδίο της Μακροοικονομετρίας. Ειδικότερα, μελετώνται θέματα και μεθοδολογίες ή τεχνικές ιδιαίτερα χρήσιμες για εκείνους τους …