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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Confidence intervals and tests for variance-component ratios in mixed linear models

Li, Yulan 23 August 1993 (has links)
Graduation date: 1994
32

From Martingales to ANOVA : implied and realized volatility /

Zhang, Lan. January 2001 (has links)
Thesis (Ph. D.)--University of Chicago, Dept. of Statistics, June 2001. / Includes bibliographical references. Also available on the Internet.
33

Use of saline wastewater for revegetation and creation of wildlife habitat.

Fitzsimmons, Kevin Michael. January 1999 (has links)
Electrical generating stations in arid regions produce saline water from their cooling systems. Coal fired plants generate fly ash which is recovered by smokestack scrubbers. This ash typically is disposed in large evaporation ponds, which leave vast ash beds and volumes of saline leachate. Restoration of vegetation and wildlife habitat on ash ponds and other impacted areas is complicated by a lack of high quality water for irrigation. I used saline water generated by plant operations to irrigate species of halophytes. These salt tolerant plants were used to revegetate ash ponds and other degraded sites at two generating stations. Once vegetation was established, it provided habitat for wildlife, forage for domestic ruminants, ornamental landscaping, controlled fugitive dust and reduced wastewater disposal costs. At the Four Corners Plant in New Mexico, 16 accessions of Atnplex canescens were tested in a common garden experiment irrigated with saline water recovered from a drainage system collecting leachate from the plant's ash ponds. Accessions from latitudes similar to Northern New Mexico grew faster and had a higher percentage of survival than accessions from more southern or northern locations. Accessions best adapted to an area would be preferable for revegetation projects. I also studied several species of halophytes (Atnplex canescens, A. lentiformis, Prosopis velutina and Paspalum distichum) planted at the Ocotillo Plant in Tempe, Arizona and irrigated with saline water from the cooling system. The vegetation had high survival and growth rates after transplanting. Ground cover increased from 5% to 60%. Surveys of wildlife were conducted pre and post-transplantion. Birds, rabbits and lizards were significantly more numerous in experimental planted areas than in untreated control plots. Rodent populations were not significantly different between treatments. Halophytes can be used to revegetate areas adjacent to electrical power plants and irrigated with saline waters that are normally discharged. Devoting saline water to revegetation irrigation is a cost effective method of disposal compared to evaporation ponds. Plantings attracted several forms of wildlife. Birds, rabbits and lizards specifically used the plants for food, cover and nesting. I developed an economic analysis which compares costs and benefits of restoration projects using halophytes irrigated with saline wastewater.
34

The analysis of two-way cross-classified unbalanced data /

Bartlett, Sheryl Anne. January 1980 (has links)
No description available.
35

Computations of bivariate and multivariate normal probabilities

Gupta, Rajendra K. January 1976 (has links)
This work involves numerical integration as well as mathematical integration techniques in computing the bivariate and trivariate normal probabilities. The probabilities have been computed and tabulated for desired ranges of the non-negative values of the random variables, and for some specific values of correlation coefficients, taking the size of the tables into consideration. Formulas, however, also been given to derive the probabilities for negative values of the random variables.Computer programs have also been developed and included to compute the probabilities so as to produce the above mentioned probability tables. These computer programs were run on DECSYSTEM-10.
36

Estimating function variance estimation in complex surveys and combined classification /

Tausi, Manuila, January 1900 (has links)
Thesis (Ph.D.) - Carleton University, 2002. / Includes bibliographical references (p. 215-222). Also available in electronic format on the Internet.
37

Statistical inference on the coefficient of variation /

Tsang, Tat-shing. January 2000 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 95-101).
38

Simulations to analyze Type I error and power in the ANOVA F test and nonparametric alternatives

Patrick, Joshua Daniel. January 2009 (has links)
Thesis (M.S.)--University of West Florida, 2009. / Title from title page of source document. Document formatted into pages; contains 80 pages. Includes bibliographical references.
39

Statistical methods in pedigree analysis and the reliability of pedigree data /

Lathrop, Gregory Mark. January 1980 (has links)
Thesis--University of Washington. / Vita. Another copy has number: Thesis 27614. Bibliography: leaves [152]-155.
40

Boundary Conditions of Several Variables Relative to the Robustness of Analysis of Variance Under Violation of the Assumption of Homogeneity of Variances

Grizzle, Grady M. 12 1900 (has links)
The purpose of this study is to determine boundary conditions associated with the number of treatment groups (K), the common treatment group sample size (n), and an index of the extent to which the assumption of equality of treatment population variances is violated (Q) with regard to user confidence in application of the one-way analysis of variance F-test for determining equality of treatment population means. The study concludes that the analysis of variance F-test is robust when the number of treatment groups is less than seven and when the extreme ratio of variances is less than 1:5, but when the violation of the assumption is more severe or the number of treatment groups is seven or more, serious discrepancies between actual and nominal significance levels occur. It was also concluded that for seven treatment groups confidence in the application of the analysis of variance should be limited to the values of Q and n so that n is greater than or equal to 10 In (1/2)Q. For nine treatment groups, it was concluded that confidence be limited to those values of Q and n so that n is greater than or equal to (-2/3) + 12 ln (1/2)Q. No definitive boundary could be developed for analyses with five treatment groups.

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