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Showing 1 to 13 of 13 for “"Chi Square distribution"”.
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Statistical response predictions in complex systems with dissipation
… statistical room acoustics. Both the statistical distribution of modal decay rates and the effect of dissipation on the intermodal correlations of natural frequency spectra are explored. It is found that for moderate damping the modal decay rates of complex systems are distributed according to a …
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Saddlepoint Approximation for Calculating Performance of Spectrum-Sliced WDM Systems
… that the signals at the decision point are chi-square distributed. Although the chi-square distribution is valid in the case where there is no interference, it is not valid in the presence of interference, since the interference from the neighboring channel has a smaller bandwidth than the …
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Robust Testing for Unit Roots Based on Regression Rank Scores
… 1/T, as the other existing tests based on least squares (LS) estimators, e.g. Dickey-Fuller (1979, 81), Phillips (1987), Phillips and Perron (1988). While their test statistics are complicated functionals of Brownian motion ours follow chi-square distribution asymptotically under both finite and …
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The development and validation of effect size measures for IRT and CFA studies of measurement equivalence
… statistical significance tests based on the chi-square distribution or empirically derived rules of thumb for determining nonequivalence. However, because of the disadvantages of these criteria, it may be informative to use effect size estimates to judge the magnitude of the observed effects …
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Computational Aspects of An Asymptotic Analysis of Method of Moments Estimators of Parameters For the Binomial Distribution
… of the known parameters p and m of the Binomial distribution and analyze them using descriptive statistics. This research first introduces the method of moments estimators of these parameters, p ̂_n and m ̂_n. Because p ̂_n and m ̂_n do not have mean values and variances, new, modified …
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A study of sub-orbital and millennial-scale climate variability over the past 1.4 million years in the Northern Atlantic
… for AR(n) model fitting to a data set, and chi-square distribution confidence intervals. These various methods are discussed and evaluated according to their usefulness in sub-orbital research.
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Επί μεθόδων στατιστικής συπερασματολογίας με χρήση της εμπειρικής χαρακτηριστικής συνάρτησης
… estimate. The estimator has an asymptotic normal distribution and high asymptotic efficiency. A simulation study reveals the efficiency properties of the estimator in small samples from a wide range of symmetric models. The estimators studied in the second chapter are employed to construct a …
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Some Nonparametric Methods for Clinical Trials and High Dimensional Data
… the Wilks-type result of convergence to a chi-square distribution for the empirical likelihood ratio based test, and asymptotic normality for the corresponding maximum empirical likelihood estimator, are established. It is also shown that the resulting test is asymptotically most powerful …
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Application on Lidar and Time Series Landsat Data for Mapping and Monitoring Wetlands
… A change threshold was derived based on the Chi-square distribution of the Z-scores. The accuracy of a change/no change map produced was 89% with a kappa value of 0.79. Assessment of the change map showed that the method used was able to detect complete wetland loss together with other subtle …
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3D Morphable Models: Data Pre-Processing, Statistical Analysis and Fitting
… model as a shape space. We observe that the distribution of parameter vector lengths follows a chi-square distribution and discuss how the parameters of this distribution can be used as a regularisation constraint on the length of parameter vectors. In Chapter 4 we take the idea introduced in …
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Exponentially Weighted Moving Average Charts for Monitoring the Process Generalized Variance
… the chart's initial and steady-state run length distributions. The three methods that are commonly used to determinate run length distribution, simulation, the integral equation method, and the Markov chain approximation are discussed. The integral equation and Markov chain approaches are …
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The Isotonic Regression Framework
… proposed large sample approximation (a weighted chi-square distribution) does not hold when the overall response probability is less than 5\% and thus exact methods are proposed in order to assess the correct p-value. In a simulation study it has been shown that the isotonic likelihood ratio test …
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Disability Self-Assessment and Upper Quarter Muscle Balance in Females
… become weaker. Statistical significance was not achieved in any of the muscular performance measures because of high variability in the holding times for the testing positions. The dental hygiene group had higher totals in all nine parts of the NPNPQ (higher totals represent more pain complaints) …