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 125 for “"Small samples."”.
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Hypothesis testing and learning with small samples
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Multivariate nonparametric control charts using small samples
… variables of a process, by collecting a small fixed random sample at fixed time intervals. The target values are considered known, whereas the variance covariance matrix of the data must be estimated. A typical parametric chart to monitor this process would involve the assumption that the …
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Estimation of partial group delay with applications to small samples
… proposed which is intended to work well even for small sample sizes. The only published procedure for estimating the partial group delay parameter is by Zhang and Foutz [1989]. The procedure by them is an asymptotic one and requires a fairly large sample size. The proposed procedure for estimating …
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UMVU estimation of phase and group delay with small samples
… performed on the group delay parameter in finite samples. In fact, spectral analysis in general does not allow for small sample inference which is a difficulty with the frequency domain approach to time series analysis. The reason that no statistical inference may be performed in small samples is …
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Decision Theory Classification Of High-dimensional Vectors Based On Small Samples
… vectors on the basis of a few training samples. The proposed method is based on the Bayesian paradigm and provides posterior probabilities that a new vector belongs to each of the classes, therefore it adapts naturally to any number of classes. Our classification technique is based on a …
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A Monte Carlo study of the robustness of the standard deviation of the sample correlation coefficient to the assumption of normality
… by non-normality, a few significantly so. In small samples (n=10, n=5) the standard deviations of r and,z are quite visibly larger for variations in skewness and variations in kurtosis. The effect is greater for the simultaneous variation of the two. However, all of the values fall within a …
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Asymptotic Results for Model Robust Regression
… λ. This technique was studied extensively at small samples and was shown to be quite effective at modeling various unusual functions. In 1995, Mays and Birch developed the MRR2 estimate as an alternative to MRR1. This model involved first forming the parametric fit to the data, and then adding …
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Fiscal Competition Among Jurisdictions: Evidence and Methodology
… Monte Carlo Experiments indicate that, in small samples, the LM and LR tests have good power, but considerable empirical size distortions, while the Wald has good empirical size and power.
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Investigations of an Automated System for Profiling of Serum Constituents in Neonatal Blood Samples
… desirable, profiling is not done on neonatal samples because of the very small samples available. It has been the objective of these studies to determine if a multichannel centrifugal analyzer (MCCA), a sample/reagent handling system, and chemical methods can be developed for profiling serum …
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Investigation of Elastic Parameters and Pavement Modeling With Eps Geofoam
… parameters derived from compression tests on small size samples. Young's modulus and Poisson's ratio are parameters required to model isotropic and homogenous material behavior. For the most widely used EPS density grade of 20 Kg/m3 (1.25 pcf), Young's modulus of 4 MPa and Poisson's ratio of …
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Inductive classifier learning from data: An extended Bayesian belief function approach
… learning, including noise, missing values, small samples, inter-attribute dependency, and irrelevant or partially relevant attributes, all of which are characteristics of real-world induction tasks.
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Combustion characteristics of South African grown fuelwoods
… attempted to examine the combustion kinetics of small samples in an attempt to achieve the stated aim. Initially a literature review was performed. This covered anecdotal information on fuelwood preferences, an overview of wood composition, structure and combustion, and an in depth review of …
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Επί μεθόδων στατιστικής συπερασματολογίας με χρήση της εμπειρικής χαρακτηριστικής συνάρτησης
… on asymptotic results and results from finite samples. These results pertain to some well known symmetric models which are useful in applied research and for which the standard methods of estimation are not efficient. In chapter III an adaptive estimator of the median of symmetric populations …
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Power Analysis for Alternative Tests for the Equality of Means.
… two population means are analyzed using small samples with data coming from distributions with different degrees of skewness and kurtosis. The analysis is done using simulation; programs in GAUSS were especially written for this purpose.</p>
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Aerobic Exercise and Hippocampal Plasticity in Young Adults with Depression
… to controls. This finding may have resulted from small samples and high variability on the measures of interest. Depression symptom decreases were not related with VO2max changes or exercise compliance.
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Estimation of the population mean using two extremes in order statistics
… properties of the range and the average of the smallest and largest order statistics are useful for estimate the population parameters of both large and small samples; The applications of the method using order statistics in a given sample to estimate the parametric values appear quite often in …
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Estimation of clinical trial success rates and related parameters
… development success rates rely on relatively small samples of pharmaceutical industry-curated databases, which are subject to potential sample selection biases. Using a sample of 185,994 unique entries of clinical-trial data for over 21,143 compounds from January 1st, 2000 to October 31st, …
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Shrinkage Estimation for Aalen's Additive Model
… relative performance of the estimators in small samples and we illustrate the methodology by using a real data on the survival of primary biliary cirrhosis patients.
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Do You Have A Friend?: The Impact Of Personal Knowledge Of Someone With Aids On Attitudes Towards Aids
… on such attitudes have employed relatively small samples collected primarily out of convenience. The studies that have used national samples have primarily addressed public policy issues. Using national data from the 1988 General Social Survey, this paper examines the effects of personal …
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Statistical Study of Solar Wind Conditions Prior to Substorm Onsets
… interval. In the past, studies have looked at small samples of substorms in order to make large-scale predictions. However in this study, a total of 28 years of solar wind data is analyzed from NASA’s OMNI database to determine if any predictions can be made at all. This thesis investigates …
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