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 795 for “"correlation coefficient"”.
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Comparison of Intracluster Correlation Coefficient Estimates For Binary Variables
… of fourteen estimators of the intracluster correlation for binary data. The comparisons were performed in an extensive simulation study. The correlated binary data, assuming an exchangeable correlation structure were simulated incorporating variations of overall event rate, event rate …
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Integrative analysis of high-throughput biological data: shrinkage correlation coefficient and comparative expression analysis
… biological data. We developed a novel correlation coefficient, shrinkage correlation coefficient (SCC), that fully exploits the similarity between the replicated microarray experimental samples. The methodology considers both the number of replicates and the variance within each …
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Evaluation of Annotation Performances between Automated and Curated Databases of <i>E.COLI</i> Using the Correlation Coefficient
This project compared the performance of the correlation coefficient to show similarities in annotations between a predictive automated bacterial annotation database and the curated EcoCyc database. EcoCyc is a conservative multidimensional annotation system that is exclusively based on …
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Extending the Utility of Ant Colony Optimization Through the Incorporation of an Intraclass Correlation Coefficient to Assess for Rater Consistency
… utility of ACO by incorporating the intra-class correlation coefficient (ICC) as an optimization criterion in seeking an optimal (or near-optimal) measurement model solution. The introduction of ICC to ACO procedures is intended to address data that features multiple observations of the same …
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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
… deviation of r, the usual estimator of the correlation coefficient, and its transform z are only negligibly affected by variation in skewness or variation in kurtosis, the effect being slightly greater for variation in kurtosis. When the variations are in both skewness and kurtosis, the …
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The time behavior of a site diversity system
… for describing diversity performance) and the correlation coefficient. Also, a relationship between the correlation coefficient and instantaneous diversity gain was established. In addition, a review of statistical diversity gain and existing models of statistical diversity gain were also …
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The Problem of classifying members of a population on a continuous scale
… are noted. We have chosen to use the multiple correlation coefficient of ranks with measured variates as a statistic in testing whether ranks are associated with measurements. We give to this coefficient the name "quasi-rank multiple correlation coefficient", and proceed to find its first four …
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The Relationship Between Home Environment and Ninth-Grade Students' Mathematics Achievement
… achievement the Pearson product moment correlation coefficient were computed, There was a positive correlation between home environment and mathematics achievement, significant at the ,01 level for all students, for male students, for female students, and for black students. The …
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Effective communication on organisational performance based on the systems theory.
… theory. Descriptive analysis and Pearson’s correlation were used to analyse the results. The results for H1 showed a Pearson correlation coefficient of 0.642 which is statistically insignificant if the (sig. 2-tailed) < 0.05 indicating that there was no statistical significant relationship …
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Nuclear Magnetic Resonance Studies of Catalysts and Model Catalytic Systems: Biochemical and Inorganic Applications (Minerals, Silicon-29, Oxygen-17, Shielding Tensors, Nmr)
… between theory and experiment is 1.96 ppm with correlation coefficient of 0.979. When all types of silicon are considered (Q('0)-Q('4)), this empirical approach is the most accurate method of predicting Si-29 chemical shifts to date, and much better than the best previous model (correlation …
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An investigation into the role real estate investment play in diversifying portfolios of institutional investors in Namibia
… research revealed that there were low negative correlation coefficients of real estate returns with the returns of bonds and cash. This therefore suggests that real estate could play the role of an effective diversifier by lowering volatility and boost returns for a given level of risk of the …
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Bacterial Interactions of Inoculated Price's Potato Bean (<i>APIOS PRICEANA</i>): A Biological Study
… data presented is for treatments 2 and 3. The correlation coefficient for average taproot length, number of lateral roots developed and taproot girth per treatment was as follows: taproot length to number of lateral roots, positive correlation coefficient 0.996; taproot length to taproot girth, …
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Development of a regional curve to relate discharge and drainage area to hydraulic geometry for the Red River of the North Basin
… based on USGS accounting units. The average correlation coefficient for this strategy was 0.62. The best fit in this grouping compared contributing drainage area (CDA) to ball discharge (BFQ), with a correlation coefficient of 0.86. The lowest fit in this category compared total drainage area …
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Evaluating the relationship between the temperature response to volcanic aerosols and climate sensitivity
… models was repeated and was found to give a correlation coefficient of -0.44 (p = 0.23), which is lower than what Bender et al. found. Extension to Coupled Model Intercomparison Project Phase 5 (CMIP5) models also shows a lower correlation coefficient. Using transient climate response instead …
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Using two-dimensional impedance maps to study acoustic properties of tissue microstructure
… therapy. In one approach to QUS, the backscatter coefficient (BSC) from a tissue is utilized to quantify and classify tissue state. The BSC is a fundamental property of a tissue based on the frequency power spectrum estimated from the RF signals corresponding to ultrasonic backscatter. From the …
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The relationship between per cent of frequently-used words and typewritability
There is a correlation coefficient of 0.237 between per cent of frequently-used words and the amount of copy produced on a typewriter in a given period.
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The association of myopia progression with family history of myopia, nearwork, and other risk factors among Singapore schoolchildren: A 2 year follow-up study
… of myopia. Among all ocular components, AL (correlation coefficient r = 0.67, P<0.001) and VCD change (correlation coefficient r = 0.84, P<0.001) were significantly associated with myopia progression. Conclusion: The risk factors with significant association with myopia progression were …
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Comparison of linear parametric models for predicting fMRI response
… subject using all the parametric models. Cross-correlation was subsequently performed between the predicted response and the actual fMRI data to compare the performance of the five models. The consistency of the models and the transfer function was checked by doing a statistical analysis. Among …
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Increasing Signal to Noise Ratio and Minimising Artefacts in Biomedical Instrumentation Systems
… a clean output signal, achieving an average correlation coefficient of 0.995. Also, the system output had a 98% SNR similarity with the clean source signal. Further, the system was then built and tested in the lab and successfully minimised the motion artefacts, achieving an average …
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Factores que influyen en la intención de compra de alimentos orgánicos en los consumidores millennials de Lima Metropolitana
… Metropolitan Lima; characterized by a Spearman correlation coefficient of 0.924. Likewise, subjective norms and purchase intention also have a statistically significant relationship, with a coefficient value of 0.864; between perceived control and purchase intention with a value of 0.969; …
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