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309 results for “variance”
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Research ArticleOpen accessEvery word in the titleCancer Classification using Support Vector Machines and Relevance Vector Machine based on Analysis of Variance FeaturesA. Bharathi, A.M. NatarajanProblem statement: The objective of this study is, to find the smallest set of genes that can ensure highly accurate classification of cancer from micro array data by using supervised machine learning algorithms. The significance of finding the minimum subset is three fold: The computational burden and noise arising from irrelevant genes are much reduced; the cost for cancer testing … …Journal of Computer Science, Vol. 7, Issue 9 · 25 Jul 2011 · 7,593 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Monte Carlo Study of Seven Homogeneity of Variance TestsHoward B. Lee, Gary S. Katz, Alberto F. RestoriProblem statement: The decision by SPSS (now PASW) to use the unmodified Levene test to test homogeneity of variance was questioned. It was compared to six other tests. In total, seven homogeneity of variance tests used in Analysis Of Variance (ANOVA) were compared on robustness and power using Monte Carlo studies. The homogeneity of variance tests were (1) Levene, (2) … …Journal of Mathematics and Statistics, Vol. 6, Issue 3 · 30 Sep 2010 · 8,103 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSpline Smoothing for Multi-Response Nonparametric Regression Model in Case of Heteroscedasticity of VarianceBudi Lestari, I. Nyoman Budiantara, Sony Sunaryo, Muhammad MashuriProblem statement: Assume that data (yki, tki), k = 1,2,…, p; i = 1,2,…,nk where nk represents the number of repeated measurement of kth object follows multi-response nonparametric regression model with variances of errors are heteroscedastic. Nonparametric regression curves are unknown and assumed to be smooth which are contained in Sobolev space. Random Errors are independent and normally distributed with … …Journal of Mathematics and Statistics, Vol. 8, Issue 3 · 13 Oct 2012 · 7,955 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMeasuring Drivers’ Effect in a Cost Model by Means of Analysis of VarianceMaria Elena NenniIn this study the author goes through with the analysis of a cost model developed for Integrated Logistic Support (ILS) activities. By means of ANOVA the evaluation of impact and interaction among cost drivers is done. The predominant importance of organizational factors compared to technical ones is definitely demonstrated. Moreover the paper provides researcher and practitioners with useful information to … …American Journal of Applied Sciences, Vol. 10, Issue 12 · 24 Oct 2013 · 6,448 accessesView PDFCite
Research ArticleOpen accessIn the keywordsPhenotypic Evaluation of Heritability, Agro-Morphological and Yield Characters of Sixteen Amaranthus Linn. GenotypesOnuoha Samuel Ogechi, Olawuyi Odunayo JosephThe field experiment was conducted to evaluate the heritability, genetic variance, agro-morphological and yield characters of Sixteen Amaranthus genotypes. The seeds of the sixteen (16) genotypes of Amaranthus evaluated in this study were; NG/AA/MAY/09/027, NG/AA/03/11/010, NG/AO/11/08/042, NG/AO/11/08/039, NG/SA/DEC/07/0423, NG/SA/DEC/07/0412, NGB01667, NGB01601, NGB01283, NGB01271, NGB01276, NGB01259, NGB01644, NGB01234, NGB01613 and NGB01662. The results showed that there were variability performances in growth … …American Journal of Agricultural and Biological Sciences, Vol. 12, Issue 3 · 3 Aug 2017 · 7,830 accessesView PDFCite
Research ArticleOpen accessIn the keywordsHigh Resolution Satellite Images to Reconstruct Recent Evolution of Domitian CoastlinePasquale Maglione, Claudio Parente, Andrea VallarioIn the last decades, combinations of natural and humanfactors have resulted in extensive morphological changes to our coastlines andin many cases have amplified erosion. In order to limit these changes and theirimpact on coastal zone, it is important toplan specific actions; for this purpose detailed cognizance of coastal zone isnecessary. Different and heterogeneous data such as historical and recent maps,remotely … …American Journal of Applied Sciences, Vol. 12, Issue 7 · 28 Aug 2015 · 7,011 accessesView PDFCite
Research ArticleOpen accessIn the keywordsTransformation Box-Cox for Stabilisation of Diversity in Group Random DesignYenny Sylvia, Djunaidy SantosoIn the field of research, there are a variety of statistical methods used. Hypothesis testing is one test that is often used to obtain the conclusions of the research conducted. One hypothesis testing that is often used is the testing of hypotheses through ANOVA (Box et al., 1978). However, in determining the validity of a hypothesis is obtained, there are … …Journal of Computer Science, Vol. 11, Issue 1 · 22 Sep 2014 · 7,175 accessesView PDFCite
Research ArticleOpen accessIn the keywordsA NOVEL ROBUST AND EFFICIENT TOOL FOR DETECTING HETEROSCEDASTICITYWei Xiong, Maozai TianOne of the greatest values of Quantile Regression (QR) is that it provides a good procedure in the sense that QR could be much more efficient and sometimes arbitrarily more efficient in recovering the mean function than the Least Squares (LS) even when without moment conditions. However, heteroscedasticity definitely causes conditional variances of parametric or nonparametric estimates of mean functions … …Journal of Mathematics and Statistics, Vol. 10, Issue 2 · 21 Mar 2014 · 6,657 accessesView PDFCite
Research ArticleOpen accessIn the keywordsIs Poisson Dispersion Diluted or Over-Saturated? An Index is Created to AnswerRamalingam ShanmugamA prelude to interpret a pattern in the repeating incidences is to identify the underlying frequency distribution of the collected data. A case in point is the Poisson distribution which is often selected for medical count data such as gene mutations, medication error and number of ambulatory pickups in a day. A requirement for the Poisson distribution is that the … …Current Research in Biostatistics, Vol. 2, Issue 2 · 24 May 2013 · 6,614 accessesView PDFCite
Research ArticleOpen accessIn the keywordsCompare the Effects of two Educational Methods on the Health Principles Knowledge of Employees in Food PreparationFereshteh Farzianpour, Gholamreza Jahed Khaniki, Farjad Batebi, Masood YunesianProblem statement: Conducting educational programs to enhance the knowledge of food preparation and distribution commerce is important in achieving health and food safety. This study aimed to compare the effects of two educational methods (book let and trade school) on the health principles knowledge of employees in food preparation and supply centers. Approach: In this cross-sectional study, 420 employees who … …American Journal of Applied Sciences, Vol. 9, Issue 10 · 25 Aug 2012 · 7,914 accessesView PDFCite