Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 43 for “"Nonparametric tests"”.
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Nonparametric tests for longitudinal data
… of this report is to numerically compare several tests that are applicable to longitudinal data when the experiment contains a large number of treatments or experimental conditions. Such data are increasingly common as technology advances. Of interest is to evaluate if there is any significant …
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The small-sample power of some nonparametric tests
… study is made of the power of two-sample rank tests of the hypothesis that both samples are drawn from the same population. The general alternative is that the variables from one population are stochastically larger than the variables from the other. One of the alternatives considered is that …
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Some nonparametric tests for constancy of regression relationships over time
… on Y₁ , ..., Y<sub>m</sub>. This study develops nonparametric procedures for testing H₀: = β = β<sub>m+1</sub> = β<sub>m+2</sub> = …. The proposed tests involve sequences of truncated sequential tests. That is, a function of the residuals Y<sub>m+1</sub> - β̂’₀ x<sub>m+1</sub>, …, Y<sub>m+N</sub> …
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The curve through the expected values of order statistics with special reference to problems in nonparametric tests of hypotheses
… literature and especially in the theory of nonparametric statistics. A new expression for this value will be obtained tor any underlying density f(x) but emphasis will be placed on normal scores. A finite series representation, the individual terms of which are easy to calculate, will be …
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The use of rank tests in analysis of variance
Several nonparametric tests based on ranks have been proposed to handle analysis of variance problems. But questions have been raised about the appropriateness of some procedures that are mere rank transformations of normal theory analysis of variance tests.
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Rank-Based Procedures for Some Multivariate Problems
… symmetry. Several well-studied parametric and nonparametric tests for univariate symmetry are extended to multivariate settings. We study the asymptotic distributions of these multivariate tests, and we propose a new criterion to compare their asymptotic relative efficiency. Monte Carlo …
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Multi-Country Event Study Methods
… are best in non-U.S. multi-country samples? Nonparametric tests, especially the rank and generalized sign, are better specified and more powerful than common parametric tests, especially in multi-day windows. The generalized sign test is the best statistic but must be applied to buy-and-hold …
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Utilization of therapeutic touch in clients diagnosed with chronic pain
… and had a bimodal distribution. Therefore, the nonparametric tests of Wilcoxon Ranks Test and the Chi Square 2 x 2 Test of Independence were done. The hypothesis, that patients diagnosed with FM and RA would demonstrate significant decreases in pain (p {dollar}<{dollar}.05) following TT when …
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A Statewide Hallmark Event: The Exploration of Participants' Perceptions and Emotions
… responded to the survey. Normality and nonparametric tests were performed. The results of the tests showed an increase in positive affect after the event than before. Most of the perceptions of the event were shown to be relatively similar based on proximity and population of the …
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The Differential Effects of Unexpected Permanent and Transitory Earnings Changes on Equity Returns
… market earnings expectations. Parametric and nonparametric tests are utilized in testing the hypotheses. The results of the empirical tests provide evidence that unexpected changes in permanent components of earnings have a greater impact on firm value than unexpected changes in transitory …
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The Dynamics of the Spread of COVID-19 in Kansas
… and policies implemented in Kansas. I used nonparametric tests, spatial, and statistical modeling, to understand the spread of COVID-19. My findings revealed how the pattern and type of diffusion, the relationship between cases and deaths, and the factors that influenced the spread of …
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Comparing acute bouts of exercise on total mood disturbance and affect in females with substance use disorder
… p < 0.05) and PA (F(1, 2) = 9.505, p < 0.05). Nonparametric tests were used for the non-normally distributed NA scores. Friedman’s test revealed a significant difference from pre- to post-NA scores between conditions (χ2 = 31.550, p = 0.001). The results from this study indicate acute bouts of …
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Development of Technology Knowledge and Beliefs: Does Instructional Modality Matter?
… technology knowledge and technology beliefs. Nonparametric tests were run to determine if there were statistically significant differences between the online and face- to-face pre-service teacher groups for two scales and 10 total subscales, but none were found. However, there were …
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Seasonal and Diurnal Behavioral Patterns of Bottlenose Dolphins, <i>Tursiops truncatus</i>, That Exhibit High Site and Low Site Fidelity to Mississippi Sound
… were analyzed. Statistical analyses consisted of nonparametric tests (Spearman's correlation, loglinear models, and Pearson's chi-square) to compare behavioral patterns of high site fidelity, mixed, and low site fidelity groups. Behavioral patterns significantly differed between site fidelity …
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Long-term outcome in patients with osteoarthritis of the hip or knee after comprehensive rehabilitation: A prospective 2 year follow-up study
… sensitivity statistics (effect size, ES) and nonparametric tests. Results: The data of 128 patients with complete follow-up data could be analyzed. Both pain and physical function improved moderately (WOMAC pain: ES = 0.56, WOMAC function ES = 0.44) until discharge of the clinic. While the …
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Multivariate analysis of the effect of source and supply and carrier on processing and shipping times for issue priority group one requisitions
… models, Generalized Linear Models (GLMs) and nonparametric methods to explore the structure of the historical requisition datasets. OLS linear models were found to be inadequate, but both the GLMs and nonparametric tests proved to be valid and yielded results from which inferences could be …
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Problem Definition and Hypothesis Generation by Recent Family Nurse Practitioner Graduates
… consisted of visual inspection of graphs and nonparametric tests for each of the dependent variables. Expected differences in accuracy between ill-defined and well-defined problems were not found. However, there were significant differences in time (p = .02) and confidence (p = .01) for …
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Social Organization and Environmental Patterning at Tel Abu Shusha: An Integrated Spatial Approach to Survey Archaeology
… to visual interpretation, Kolmogorov-Smirnov nonparametric tests are used to gain insight on environmental settlement preferences; Ripley’s K analysis aids in interpretation of multiscalar point patterning; and pure locational (k-means) and unconstrained clustering methods provide information …
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The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa
… seaweed flora. Additionally, Kruskal-Wallis nonparametric tests with pairwise Mann-WhitneyU-tests were used to examine differences in macroalgal assemblages among substratum types.
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