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 26 for “"F-statistic"”.
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An investigation of the power of various alternatives to the ANOVA F statistic when population variances are unequal
Call number: LD2668 .R4 STAT 1988 S67
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Continuous authentication on android mobile devices
… achieved a strong discriminative power with F-statistic = 4.26, but with high within-user variability, with a coefficient of variation (CV) between 54.5% and 74.8%. At the same time, stylometry showed moderate discriminative power with F-statistic = 3.64 but with enhanced stability, with CV …
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Decision tree rule-based feature selection for imbalanced data
… selection approaches, i.e., Chi-Square and F-statistic. The results show that they outperform them but need slightly more computational efforts.
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Identifying Forest Conversion Hotspots in the Commonwealth of Virginia using Multitemporal Landsat Data and Known Change Indicators
… accurately (overall accuracy = 85.4 percent, F-statistic = 0.86) into housing starts and other forest disturbances using a classification tree and only two variables from the Disturbance Detection and Diagnostics (D3) algorithm: the maximum NDVI in the available recovery period and the slope …
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The Sequential Givens method for adjustment computations in photogrammetry
… and greatly simplifies the computation of statistics on the observations and residuals. The underlying reason for these advantages is the immediate availability of the orthogonal Q matrix, which is computed as the data are processed and is intimately related to the statistics needed for …
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Application of a New Tree-Ring Based Drought Reconstruction Method at Multiple Forest Sites Across Indiana, U.S.A.
… residuals, root-mean-square error (RMSE), F statistic, and Akaike Information Criterion (AIC). Summer (June–August; JJA) Palmer Drought Severity Index (PDSI) was the best predicated climate variable, thus two separate models (SS and MCOS) were created at each site for reconstruction. The MCOS …
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The Impact Of Foreign Direct Investment on Economic Growth in Tanzania from 1990 to 2013
… the relationship amongst the variables. The F statistic is statistically significant meaning the independent variables i.e. FDI inflow, gross capital formation, inflation, exports and labour are all significant to explain Growth in the economy. Then the Johansen cointegration test was performed …
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A robust estimation method of location and scale with application in monitoring process variability
… set equality. Both criteria do not require any statistical computations, including the generalized variance in FMCD and vector variance in MVV. Since only a logical test is needed, the computational complexities of the C-step are of order ( ) ln O p p. The second part is the application of the …
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The use of cognitive mapping strategies for formulating Nursing diagnoses of a patient in pain
… from the experimental and control groups. The F Statistic for the dependent variable was 130.746, which with 1 and 57 degrees of freedom was highly significant. The results indicated that when the final scores were adjusted to take into account the pretest scores of the subjects, there was a …
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Staff nurse job satisfaction as motivation for participation in staff development programs
… eight using a one-way analysis of variance (F Statistic).The first purpose of the study, to examine the relationship between job satisfaction levels and levels of motivation for participation in staff development programs, revealed that job satisfaction was not found to be correlated …
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Structural breaks and outliers detection in time-series econometrics: Methods and applications
… bootstrapping procedure based on the sup-F statistic. Through an extensive Monte Carlo exercise, we explore the ability of the two approaches to detect the correct number and the correct location of the breaks. Additionally, we illustrate how to apply empirically the two procedures by …
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Comparative Power Of The Anova, Randomization Anova, And Kruskal-Wallis Test
… are equal and samples approach 30 or more. The F statistic has also been proposed to have the same robust qualities as the t, though researchers have suggested that because a test is robust to departures from normality, that does not necessarily make it the best test for every situation. With the …
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Essays in weak identification
… relationships of interest. In such cases, the statistical techniques commonly used in applied economics can break down and fail to accurately reflect the level of uncertainty present in the data. If they rely on such tools, researchers and policymakers may come away with serious misconceptions …
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Spatiotemporal brain imaging
… interpretation of the localization in terms of a statistical measure (F-statistic). Using experimentally generated current dipoles implanted an epilepsy patient, I examine the accuracy of both a realistic and spherical EEG head model. This experimental data demonstrates the improved accuracy of …
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Evaluating dry matter loss rates of 14 to 22% moisture content soybeans at 35°C using a dynamic grain respiration measurement system
… tests with 18 % moisture content soybeans, a statistical power analysis showed that a minimum of four replications was needed for a 3w x 1T factorial experiment. The analysis of variance (ANOVA) results, however, showed that across the w tested, the minimum significant difference between …
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Validating the ability of REIMS to differentiate lamb flavor performance based on consumer preference
… top 100 REIMS bins were determined by an f-statistic value and applied to reduce dimensionality before creating the model using LDA. Moreover, top 100 REIMS bins were entered into UCSD Metabolomics Workbench to determine possible compounds responsible for sheep characteristics and flavor …
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Essays on Testing Hypotheses When Non-stationarity Exists in Panel Data Models
… I discuss the limiting distribution of the t-statistic; using different panel data estimators and propose using the t-statistic based on Feasible GLS estimator. In the second essay, I develop the bootstrap F-statistic for cross-sectional independence in a panel data model with factor …
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Bismuth Tungstate Photocatalysis for N-Nitrosamines Removal from Amine Washing Wastewater
… experimental responses and evaluated using F- statistic and p- value in Analysis of variance (ANOVA). By removing insignificant terms based on p-value, it was assessed that the quadratic model fits best for experimental responses with all metal impregnated catalyst. Impact of operational …
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Decoding Continuous Gravitational Waves from Pulsars: A Multi-Wavelength Approach
… analysis method that combines the F-statistic with a hidden Markov model (HMM) to track the stochastic wandering of the CW signal frequency throughout the observation period. This approach strikes a good balance between computational efficiency and sensitivity. The first search …
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Search for a diffuse astrophysical neutrino flux with KM3NeT/ARCA
… υποσύνολο αυτών, επιλεγμένο βάσει της ANOVA F-statistic κατανομής τους, χρησιμοποιήθηκε για την εκπαίδευση αλγορίθμου μηχανικής μάθησης βασισμέ- νου στον αλγόριθμο Boosted Decision Tree (BDT), με στόχο τη βελτιστοποίηση της διάκρισης μεταξύ σήματος και υποβάθρου. Δύο ανεξάρτητα μοντέλα BDT …
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