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Showing 1 to 20 of 125 for “"Stratified sampling"”.
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Functional quantization-based stratified sampling
Functional quantization-based stratified sampling is a method for variance reduction proposed by Corlay and Pagès (2015). This method requires the ability to both create functional quantizers and to sample Brownian paths from the strata defined by the quantizers. We show that product quantizers are …
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A Model for the Generalizability of Tests Constructed by Stratified Sampling
Made available in DSpace on 2014-12-08T21:23:43Z (GMT). No. of bitstreams: 1 6604236.pdf: 4295437 bytes, checksum: 53a2e7786944d16c330428b226a95706 (MD5) Previous issue date: 1965
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A Conic Quadratic Interior-Point Method for a Class of Stratified Sampling Problems
<p>The stratified sampling problem is a very important problem that arises in different applications and very often in statistics The purpose of this thesis is to numerically test two interior point methods on the stratified sampling problem. First, a homogeneous conic quadratic interior point …
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Sinkhole Form as an Indicator of Process in Karst Landscape Evolution
… unit, the sinkhole; and then using a random, stratified sampling design, postulates and evaluates the importance of non-solutional processes in the development of sinkholes in two contrasting karst subtypes (normal and exhuming fluviokarst) of the Mitchell Plain, south central Indiana.
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Interdisciplinary team organization: the distribution, structure, and important components of implementation in Virginia high schools
… students and have a common planning period. A stratified sampling was used to select 123 Virginia high schools of which 67 consented to participate in the study. All core subject teachers in each school were surveyed. The survey used Erb and Doda's (1989) model of four hierarchical …
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Research, Science and Technology Parks: A Global Comparison of Best Practices
… the culture of innovation in the ecosystem. A stratified sampling procedure from a population of 793 parks was used; analysis of variance (ANOVA) and multivariate analysis of variance (MANOVA) were used to test for significance. 130 RPs from three continents participated in this study. No …
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Variance reduction for Poisson and Markov jump processes
… for Markov processes. Both antithetical and stratified sampling variance-reduction techniques are considered for Poisson mean estimation, and a hybridization of them is developed that has lower variance than either for every value of the Poisson parameter. Several analytical characterizations …
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Effects of leadership styles on organisational commitment in two selected higher education institutions in South Africa
… used for data collection. The researcher used stratified sampling by grouping employees from each institution into academic and non-academic strata. In this study, descriptive statistics, Pearson correlation, multiple regression analysis were performed. The study indicated that transformational …
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An investigation into factors affecting strategy implementation at the Namibia Students Financial Assistance Fund
… with a sample size of 30 people selected using stratified sampling. The researcher used Excel to do the content analysis by analysing responses from interviewees through coded responses and consolidated them into themes. The major outcome of the study concludes that the Fund faces numerous …
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Relationships between undergraduates' argumentation skills, conceptual quality of problem solutions, and problem solving strategies in introductory physics
… physics topics. Participants were assigned via stratified sampling to one of three conditions (control, guided construct, or guided evaluate) based on gender and pre-test scores on a conceptual instrument. The guided construct and guided evaluate groups received tasks and prompts drawn from …
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Statistical verification and differential privacy in cyber-physical systems
… models. In addition, the advantage of stratified sampling in verifying Probabilistic Computation Tree Logic on Labeled Discrete-Time Markov Chains is studied; this method can potentially be extended to other statistical verification algorithms to reduce computational costs. The second …
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The impact of COVID-19 on the livelihood of informal sector workers: A case study of street vendors in Eenhana Town, Ohangwena region, Namibia
… of street vendors were targeted using a stratified sampling method. Data was gathered using a quantitative survey questionnaire. The data collected through the questionnaires was subjected to statistical data analysis techniques utilising version 23 of the Statistical Package for Social …
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Estimating Carbon Pool and Carbon Release due to Tropical Deforestation Using High-resolution Satellite Data
… done by modified dark object subtraction method. Stratified sampling design based on the remote sensing image was applied for assessing the above-ground biomass and carbon content of the study area. Field sampling was done during 2002-2003. Dbh and height of all the trees inside the sample plots …
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The Influence of Workplace Stress on Employees’ Performance at Mbeya Regional Hospital, Tanzania
… on a sample of 120 respondents attained through stratified sampling and convenience sampling techniques. Primary data were collected using structured questionnaire. Descriptive statistical and multiple regression analysis were used in analyzing the data with the aid of SPSS version 20. Findings …
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The Academic Performance and Competence for pupils and student living with Disabilities in Tanzania. The case of Primary and Secondary Schools in Temeke District
… in Dar es Salaam region. Both purposive and stratified sampling techniques were employed to obtain sample respondents. The method used in collecting data was interviews which had both structured and semi – structured questions, Focus Group Discussions and observations. Three hundred and …
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Assessment of Motivation Level Among Primary Health Care Workers in Tanzania : A Case Study of Muhimbili National Hospital
… workers. The study was a qualitative one. Stratified sampling was used to randomly pick about 10% of: doctors, nursing staff, auxiliary clinical workers and other administrative and supporting staff. About 58% and 42% of the workers were females and males respectively. Problems facing …
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Growth, performance and quality attributes of steers supplemented with high oleic soybean oil
… steers. 30 steers were sorted by weight using stratified sampling design into four pens, 2 being control and 2 being treatment. Control steers were fed a diet that included 3% regular soybean oil, while treatment steers were fed a diet with 3% high oleic soybean oil (HO). All animals were fed …
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Investigating the medical equipment maintenance practices in selected hospital in Zambia.
… the sample from the target population. Sampling was done using stratified sampling method and applying Yamane (1967) formula. The study adopted proportionate stratified sampling where the general population was stratified into various groups. The study then distributed the sample size so …
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Job satisfaction and Labour Turnover in Local Government Authorities in Tanzania
… used a cross sectional survey research design. Stratified sampling procedure with simple random sampling and purposive sampling were used in sample selection. Data was collected using questionnaire. A closed ended questionnaire was used as a tool for data collection. Descriptive statistical …
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The effectiveness of route-to-market distribution strategy to fast moving consumer goods industry, carbonated soft drinks category, case of SBC Tanzania Limited - Pepsi
… to which market feedback has been improved. Stratified sampling of 50 respondents consisting of SBC Sales team and distributors was selected; using both qualitative and quantitative research approach in data collection. Questionnaires, interview, observation and documentary review were the …
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