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 1850 for “"chi-square"”.
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Differential Item Functioning and Opportunity to Learn: Adjusting the Mantel-Haenszel Chi-Square Procedure
Test fairness is an omnipresent educational and political issue. The validity of a test is in question whenever any group feels its members are not being treated exactly like everyone else. Differential item functioning (DIF) refers to a test item that does not perform the same way for two groups …
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A Search for WIMP Dark Matter using an Optimized Chi-square Technique on the Final Data from the Cryogenic Dark Matter Search Experiment (CDMS II).
… events from backgrounds using a 5-dimensional chi-square method. This data analysis technique combines the event information recorded for each WIMP-search event to derive a background-discrimination parameter capable of reducing the expected background to less than one event, while maintaining …
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Approximating the distributions of x2-type mixtures via matching four cumulants
… which can be written as a random variable of chi-square-type mixtures. Zhang (2003) proposed to approximate its distribution using a random variable of form chi-square-type mixtures via matching the first three cumulants. In this thesis, we attempt to improve this approximation via matching …
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The association between learning processes and formal music electives among sixth grade music students
… <p>Data were analyzed four ways employing chi square analyses. The observed chi square value for the total population was 20.24. Subsequent chi square values were, 4.38 within instrumental ensembles, 5.10 between instrumental and vocalists, and 10.85 among instrumentalists, vocalists and …
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An Analysis of Agressive Interactions Between Procambarus Spiculifer and Procambarus Versutus in Laboratory-Based Interspecific Contacts
… the author. P. versutus won 26 of 40 contests. Chi Square analysis revealed that this outcome deviated from an expected 50/50 ratio at the .942 significance level, suggesting support for the hypothesis that no difference exists in competitive behavior outcomes between the two species at the .05 …
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A Performance Analysis of the Minimax Multivariate Quality Control Chart
… charts is performed with respect to their Chi-Square control chart counterparts under several different conditions. A unique control chart must be constructed for each process described by a unique combination of quality characteristic mean vector and associated covariance matrix. The three …
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Medical Imaging Field of Magnetic Resonance Imaging: Identification of Specialities Within the Field
… incorporated the use of factor analysis and chi square. Factor analysis was used to group tasks performed by MRI technologists into factors to better identify emerging specialty areas within the MRI profession. Chi square was used to analyze the association between the tasks performed in (a) …
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A comparative analysis of governance in U.S. colleges and universities
… and quality significant (alpha = .05). The chi-square statistic was used to compare the number of correct predictions to the number expected by chance. The chi-square was not significant at alpha = .05. The model was revised using the difference between faculty and administrative power to …
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Factors influencing equitable access to improved water supply in uMlalazi Local Municipality
… Local Municipality. The findings showed that the chi-square values for the variables were; size of economy (chi-square = 30.445a, df = 2, p-value = 0.00 and n= 274); access to pipe water within dwelling (chi-square = 109.540a, df = 2, p-value = 0.00 and n = 274); dependence on surface water …
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The Relationship Between Gender Differences and Writing Topic Choices of Middle School Students
… the genders' topic choices were compared using a Chi Square test of significance. The Chi Square Analysis showed no significant difference in the territorial distribution of topic choices between the boys and girls.</p>
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Evaluating Equivalence Testing Methods for Measurement Invariance
… a statistically nonsignificant results in a chi square difference test or a small change in goodness of fit indices (GOFs) such as CFI or RMSEA are used to conclude invariance. Yuan and Chan (2016) proposed replacing these approaches with an equivalence test analogue of the chi square …
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The effect of nurse-offered instruction to new mothers on their correct use of infant restraint devices
… the correct use of infant restraint devices. A chi-square test revealed that there were no significant differences in the correct use of infant restraint devices between the two groups. The results of a chi-square test indicated a significant difference in the correct use of infant restraint …
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Parameter optimization of the nonlinear and linear xenon oscillation models
… oscillation problem was also examined. The best chi-square fit to the actual test data was established as the guiding criterion. The nonlinear model initially produced an excellent chi-square fit of 0.708 against plant data. This value could only be reduced through parameter variation to 0.695, …
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Algorithms in comparative genomics
… used in phylogeny reconstruction. This was achieved by improving upon Gotoh's iterative heuristic by iterating with maximum parsimony guide-trees. This approach has shown an improvement in accuracy over standard alignment programs. A novel alignment algorithm named Probalign-RNAgenome that …
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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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A Study of Locus of Control and Brain Dominance of 5Th and 6Th Grade Children
… study. Test scores were compared by the use of Chi-Square "Goodness of Fit" with p = .0001, indicating that a significant occurrence existed in the type of locus of control among fifth and sixth grade students. There were significantly more internal than external students. There was no …
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Assessing Factors that Distinguish First-Generation College Students from Non First-Generation College Students at an Urban Comprehensive University
… for this study consisted of a combination of chi-square and descriptive discriminate analysis using logistic regression. Chi-square analysis was the preliminary statistical procedure used in this study. I relied on a sequence of chi-square analyses to help identify a list of statistically …
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Logistics regression to determine the influence of Bean and Metzner's persistence factors as defined by the Community College Survey of Student Engagement (CCSSE) on nontraditional students
… at a community college in the Midwest using archival data. Independent variables included select CCSSE items that related to variables identified by Bean and Metzner (1985) in their Model of Nontraditional Undergraduate Student Attrition. The dependent variable was persistence. Data were …
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Rapid Detection of <em>Streptococcus mutans</em> in Saliva
… While the null hypothesis was rejected using the chi square test, the results were inconclusive due to expected values. However, other chi square results revealed that the test worked or had the potential to work. Furthermore, it was concluded that the test had high specificity. Further research …
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