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Search Results: 1 - 10 of 43652 matches for " statistical analysis "
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Market Segmentation for Mobile TV Content on Public Transportation by Integrating Innovation Adoption Model and Lifestyle Theory  [PDF]
Chi-Chung Tao
Journal of Service Science and Management (JSSM) , 2008, DOI: 10.4236/jssm.2008.13026
Abstract: An integrated approach based on innovation adoption model and lifestyle theory for customer segmentation of mobile TV content on public transportation using multivariate statistical analysis is proposed. Due to high daily trips and dif-ferent train types Taiwan Railway Administration is chosen as the case study. Firstly, the content of mobile TV on the train are identified as the segmentation variable and key factor facets for mobile TV content are renamed by using fac-tor analysis. Then, the cluster analysis is used to classify customer groups which are named by analysis of variance (ANOVA) and market segmentations are described with demographic, lifestyle and train patronage variables by using cross analysis and Chi-squared independence tests. Finally, this paper discusses empirical results to provide valuable implications for better mobile TV content marketing strategies in the future.
Analysis of the Electromagnetic Pollution for a Pilot Region in Turkey  [PDF]
Ozgur Genc, Mehmet Bayrak, Ercan Yaldiz
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.23021
Abstract: In this paper, electromagnetic (EM) pollution (or radiation) measurements in a transmitter region were performed and statistical analysis of values recorded for the EM sources causing pollution was carried out. The actual measurement values and the estimated values by the analysis model obtained through the statistical analysis were compared. EM radiation levels were measured in the districts of Turkish capital Ankara where cellular base stations and TV/Radio stations are densely populated. EM Radiation (EMR) levels were measured for the GSM900, GSM1800, UHF4, VHF4 and VHF5 stations for certain spectrum ranges under far-field conditions by utilizing isotropic field probe and selective spectrum analyzer. The obtained measurement levels were compared with the limit values given by International Commission for Non-Ionizing Radiation Protection (ICNIRP). The results are discussed, regarding both the obtained values that influence the measurements.
The Statistical Analysis and Evaluation of Examination Results of Materials Research Methods Course  [PDF]
Wenjie Yuan, Chengji Deng, Hongxi Zhu, Jun Li
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.37B042
Abstract: The statistical analysis and evaluation of examination results provide the theoretical basis for teaching quality and management. Materials research methods course is the key course for the undergraduates major in materials science and engineering. Based on the examination results of inorganic nonmetal materials engineering specialty students in the first term of 2011-2012 school year of Wuhan University of Science and Technology, the quantitative analysis for several parameters including difficulty, discrimination and reliability were investigated. The results indicate that the distribution of examination scores approximate to normal distribution. Difficulty of the exam paper belongs to median level, and discrimination of this is qualified as well as reliability. Thus it was concluded that the design of the examination paper was good and dependable.
A Study on Institution of Corporate Social Responsibility: A Review, Summary and Prospect  [PDF]
Zicheng Liu, Zhiqiang Huang
American Journal of Industrial and Business Management (AJIBM) , 2017, DOI: 10.4236/ajibm.2017.72008
Abstract: A consensus on whether companies should fulfill their social responsibility has been reached in the 1990s. That is: companies should take social responsibility. However, there is no universal acknowledgment about what kind of responsibility companies should take and how to fulfill social responsibility. In this paper, a systematic summary has been built from both the national level and corporate level by reviewing domestic studies on the institution of corporate social responsibility (CSR) in recent years. The study summarizes the defects, the countermeasures, and suggestions of CSR institution on a national level in our country. In addition to the suggestions proposed through comparing Chinese and foreign institutions, this paper mainly summarizes those proposed by domestic scholars that are suitable for China’s national conditions. On a corporate level, we summarize the internal management of CSR institution, its external influence on the company, and the functional mechanism of CSR institution for stimulating enterprises to perform social responsibility. We find that the studies of CSR institution on a corporate level mainly focus on the relationship between CSR institution and corporate reputation, competitiveness, and performance. But the conclusion is not absolutely consistent. Most of the researches are normative researches while empirical researches are rare. This study also makes a statistical analysis on 231 articles on CSR institution published in CSSCI by domestic scholars. The analysis shows that the number of related studies reached the breaking point in 2008 and arrived at the peak in 2009, since when it has become a research hotspot. On the variation of research topics, topics change with the development of the society and the transition of social problems. Lastly, based on previous researches, this paper analyzes the prospect of future research content and research directions.
An Empirical Study of Online and Offline Price Deviation in B2C Market  [PDF]
Rongrong Fu
Open Journal of Business and Management (OJBM) , 2019, DOI: 10.4236/ojbm.2019.72035
Abstract: In this paper, we use Python crawler to automatically collect price information of online and offline electrical appliances on e-commerce websites, collect price information of offline electrical appliances market through field research, and compare and analyze commodity price and dispersion of online and offline electrical appliances market using market price dispersion model. The results show that although there is some price dispersion in the online market, the online household appliances market is still lower than the offline market, and the market efficiency is higher. Moreover, the discrete degree of online and offline prices has obvious “festival effect” in China’s “Double Eleventh and Double Twelfth” online shopping festivals.
Biometric and statistical investigations on the cnidoma of the genus Hydra (Cnidaria, Hydrozoa)
Deserti, Maria I.;Zamponi, Mauricio O.;
Iheringia. Série Zoologia , 2012, DOI: 10.1590/S0073-47212012000300008
Abstract: this paper deals about the nematocysts like a source of biometric information for comparison between the species hydra vulgaris pallas, 1766, hydra vulgaris pedunculata deserti et al., 2011 and hydra pseudoligactis (hyman, 1931). this biometric tool lets us carry out statistical comparisons and adding these results to the identification of specimens from different classificatory groups. in this particular study, we obtained significant differences between species, individuals of each species and nematocysts type when compared the biometry of its nematocysts. another result was the variation in of particular nematocysts, like atrichous isorhiza and holotrichous isorhiza for the species h. vulgaris in relation to the column size.
A hipótese de estudo determina a anális e estatística: Um exemplo com o modelo ANOVA
Garcia-Marques,Teresa;
Análise Psicológica , 1997,
Abstract: there is a close relation between experimental hypothesis, experimental design and statistical data analysis. in order to understand the way statistical data analysis is dependent of design and hypothesis this article discusses three different approaches to the same set of data, all them within an anova model. the first approach neglects the factorial nature of the design and analyses the data with an one-way anova. the second approach has in consideration the nature of the design but not the specificity of the hypothesis that orientated the study. the third approach tries to achieve a total fit between statistical and study hypothesis, suggesting a couple of planned comparisons. the conclusions associated with these three different approaches allow us to understand the argument of a close relation between the way we plan the study and the way we analyze its data.
Caracterización y clasificación geoquímica de asfaltitas cubanas
Dominguez, Zulema;Guzzo, Jarbas Vicente Poley;Azevedo, Débora de Almeida;
Química Nova , 2008, DOI: 10.1590/S0100-40422008000600011
Abstract: traditional biomarker parameters and aromatic compounds were applied to characterize and classify ten cuban asphaltites (asphaltene-rich petroleum occurring as seeps or filling veins, joints, cavities and fissures). genetic molecular parameters were compared in order to establish oil-oil correlations between samples. thermal evolution was investigated using saturated biomarker and aromatic maturity parameters. all samples seem to represent petroleum in the early catagenetic stage. statistical procedures used as auxiliary techniques show that they represent oils of family ii (marine anoxic carbonate sourced oils), except for 2 samples interpreted as belonging to family iii oils (normal marine siliciclastic suboxic sourced oils).
Determina??o de benzeno, tolueno, etilbenzeno e xilenos em gasolina comercializada nos postos do estado do Piauí
Silva, Flamys Lena do N.;Santos Jr., José Ribeiro dos;Moita Neto, José Machado;Silva, Rosa Lina G. do N. P. da;Flumignan, Danilo Luiz;Oliveira, José Eduardo de;
Química Nova , 2009, DOI: 10.1590/S0100-40422009000100011
Abstract: automotive gasoline consists of a complex mixture of flammable and volatile hydrocarbons derived from crude oil with carbon numbers within the range of 4-12 and boiling points range of 30-225 oc. its composition varies with the kind of crude oil and the type of refinery process that they undergone. aromatics hydrocarbons, in particular benzene, toluene, ethylbenzene and isomeric xylenes (btex) are the toxic group constituents presents. gc-fid was employed to quantify these hydrocarbons in 50 commercial gasoline samples from piauí state. statistical analysis techniques, such as pca and hca were used to analyze the data. moreover, several validation parameters were evaluated.
Método de simula??o e escolha de fatores na análise dos principais componentes
Fleck,Marcelo P.A.; Bourdel,Marie C.;
Revista de Saúde Pública , 1998, DOI: 10.1590/S0034-89101998000300010
Abstract: objective: there are many methods to determine how many components should be retained in principal components analysis. this choice can be made on the basis of arbitrary (kaiser) or subjective (interpretable factors) criteria. this work presents the simulation criteria of lébart e dreyfus. the method create a matrix of randomized numbers and a principal component analysis is performed on the basis of this matrix. the components extracted from this data represent the cut off values. those that exceed this cut off value should be retained. as an example, a principal component analysis is performed with the hamilton depression rating scale (17 items) on a sample of 130 subjects. results and conclusion: the simulation method is compared with the kaiser method and is shown that the simulation method maintains the components clinically significant.
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