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 411 for “"Statistical tests"”.
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Invariance Properties of Statistical Tests for Dependent Observations
… of the centering matrix A*. Next we present the statistical applications of our matrix theoretic results. For example, we show that the usual two sample t-statistic has a t-distribution if the observations in one of the samples are positively equicorrelated and those in the other sample are …
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Inconsistency of Statistical Tests to Discriminate Lifetime Distributions and lines of Indistinguishabilty in Uniform Metric
… My thesis investigates the inconsistency of the statistical test to discriminate between these lifetime distributions and lines of indistinguishability in the uniform metric.
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Contributions to the theory of statistical breakdown
The theory of statistical breakdown is studied from two different angles. Firstly, the finite sample breakdown points of estimators are found to be inherently related to their tail performances. This connection provides persuasive new evidence for the importance of the breakdown point of estimators …
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A Socio-Psychological Analysis of Eating Behaviors at Fast Food Restaurants
… and Sciences at the University of Toledo. The statistical tests (using SPSS 20) revealed that attitude toward taste did not influence fast food consumption; nutritional information did not influence fast food consumption; and moreover, attitude toward taste did not influence nutritional …
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Impact of a physical education teacher’s age on elementary, middle school, and high school students’ perceptions of effectivenss and learning
… their perceptions of the teacher. Inferential statistical tests for Study One indicated that elementary students who watched the YAL scored significantly higher on the content examination and perceived the teacher to be significantly more likeable, competent, and a better role model than did …
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Addressing the Issue of Meta-Analysis Multiplicity in Education and Psychology
… concept of multiplicity, conducting multiple statistical significance tests in one study, has pervaded primary research over the last 7 decades (Hochberg & Tamhane, 1987). This continued discussion was due to the fact that multiplicity increases the probability of committing a Type 1 error …
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Resolving Gnetum Evolutionary History
… regions increase phylogenetic resolution. Statistical tests determined that the data were sufficient to answer questions about deep splits, and to resolve the branches within the genus. I used each of the two data sets to infer Maximum Parsimony and Maximum Likelihood phylogenetic …
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Econometrics analysis of Weak form efficiency and Calendar effects in Dar es salaam Stock Exchange
… hypothesis, the study employed various statistical tests: serial correlation test-The Ljung-Box test, Unit root tests, parametric runs test and the variance ratio test. For investigating the calendar effects, the study used two econometric models: Ordinary Least Square (OLS) regression …
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Decisions Set in Stone: Spatial Analyses of Ozark Rock Art Sites, Elements, and Motifs with GIS
… Salem Plateau section of the Arkansas Ozarks. Statistical tests, such as chi-square and t-testing, are applied to provide an objective view of rock art patterning in relation to the overall landscape. The data collected from these methods allow one to discern the locational preferences for rock …
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The economics of large scale wheat production in Zimbabwe
… budgets. The budgets as well as direct statistical tests are discussed as means of evaluating hypotheses on resource use. The study suggests that economies of size exist in wheat production in Zimbabwe.
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The determination of direction of motion stereotypes for automobile controls
… of directional stereotypes. In addition, statistical tests were conducted to determine the effects of age, gender, type of vehicle driven, and handedness on subject behavior. Confidence limits were also calculated and tabulated. In general, results showed that most control designs and …
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A fast procedure for generating random numbers by a modification of the Marsaglia-Maclaren method
… generator is tested extensively in a variety of statistical tests and simulation problems.
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The Effects of Humor on Cognitive Learning in a Computer-Based Environment
… the presentation than a control group treatment. Statistical tests did not support either hypothesis.
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The geochemistry and sedimentology of quaternary shelf sediments of the Tugela River, Natal, South Africa
… to obtain qualitative mineralogy. Multivariate statistical tests were used to aid the interpretation of the data, and to statistically distinguish between the two mud belts. A detailed sedimentological model of the hydraulic populations of sediment in the area has been formulated. The …
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A statistical theory of the epilepsies
… a treatment program. The results of a battery of statistical tests on seizure distributions are discussed. The physical theory of the electroencephalogram (EEG) is described, and extant models of the electrical activity measured by the EEG are discussed, with an emphasis on their physical …
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Statistical analysis of end-points in cancer clinical trials
… published clinical trials found the most common statistical test in use to be a Chi squared test of the total response rate, but a total of 21 different statistical methods were used. The various statistical tests available are reviewed, including the Mann-Whitney test and the Chi squared test …
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Multitaper Methods for Cyclostationary Feature Detection in Time Series Data: Application to ACE Interplanetary Magnetic Field Data
… testing and comparison of three proposed statistical tests for the presence of cyclostationarity in time series data. Moreover, it is hypothesized here that interplanetary magnetic field data collected at ACE is almost-cyclostationary and this thesis aims to determine a set of …
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Depth Profiles and Soil Textures of the Vernal Pools of the Santa Rosa Plateau Preserve, Riverside County, California
… margin of the pools, for 11 out of the 13 pools. Statistical tests showed that the percentage of clay was highly significant within the center soil of the pool as compared to the soil outside the margin of the pool boundary.</p>
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Developing Criteria for Extracting Principal Components and Assessing Multiple Significance Tests in Knowledge Discovery Applications
… of data and the interpretation of multiple statistical tests. The first issue addressed by this research is the determination of the number of components to retain in principal components analysis. This research establishes regression, asymptotic theory, and neural network approaches for …
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Extensions to the data reconciliation procedure
… The presence of gross errors invalidates the statistical basis of data reconciliation and corrupts the results obtained. Gross error detection is traditionally performed using statistical tests coupled with serial elimination search algorithms. The statistical 'tests are based on either the …
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