نتایج جستجو برای: analysis of variance

تعداد نتایج: 21326943  

Journal: :ETS Research Bulletin Series 1973

2017
Kallner Anders

Significance testing in comparisons is based on Student's t-tests for pairs and analysis of variance (ANOVA) for simultaneous comparison of several procedures. Access to the average, standard deviation and number of observations is sufficient for calculating the significance of differences using the Student's tests and the ANOVA. Once an ANOVA has been calculated, analysis of variance component...

Journal: :Bernoulli : official journal of the Bernoulli Society for Mathematical Statistics and Probability 2013
Xing Sun Andrew B Nobel

We investigate the maximal size of distinguished submatrices of a Gaussian random matrix. Of interest are submatrices whose entries have an average greater than or equal to a positive constant, and submatrices whose entries are well fit by a two-way ANOVA model. We identify size thresholds and associated (asymptotic) probability bounds for both large-average and ANOVA-fit submatrices. Probabili...

Journal: :Evolution; international journal of organic evolution 2002
Christian Peter Klingenberg Marta Barluenga Axel Meyer

Morphometric studies often consider parts with internal left-right symmetry, for instance, the vertebrate skull. This type of symmetry is called object symmetry and is distinguished from matching symmetry, in which two separate structures exist as mirror images of each other, one on each body side. We explain a method for partitioning the total shape variation of landmark configurations with ob...

2016
Deanna Long Susan Szabo

This quasi-experimental mixed methods study examined the use of ereaders during guided reading instruction and its impact on 5th grade students’ reading motivation, attitude toward reading, and reading comprehension. For 10 weeks, 19 students received guided reading instruction by means of the traditional paper/text format, while 16 students received guided reading instruction by means of e-rea...

Journal: :Twin research and human genetics : the official journal of the International Society for Twin Studies 2010
Camelia C Minica Dorret I Boomsma Sophie van der Sluis Conor V Dolan

This article concerns the power of various data analytic strategies to detect the effect of a single genetic variant (GV) in multivariate data. We simulated exactly fitting monozygotic and dizygotic phenotypic data according to single and two common factor models, and simplex models. We calculated the power to detect the GV in twin 1 data in an ANOVA of phenotypic sum scores, in a MANOVA, and i...

2014
Ciarán Brewster Christopher Meiklejohn Noreen von Cramon-Taubadel Ron Pinhasi

The Last Glacial Maximum (LGM) represents the most significant climatic event since the emergence of anatomically modern humans (AMH). In Europe, the LGM may have played a role in changing morphological features as a result of adaptive and stochastic processes. We use craniometric data to examine morphological diversity in pre- and post-LGM specimens. Craniometric variation is assessed across f...

Journal: :Clinical linguistics & phonetics 2007
Amit Bajaj

Measures of language sample length (in c-units) and morphological, syntactic, and narrative abilities were obtained from oral narrative transcripts of 22 children who stutter and 22 children who do not stutter; participants attended kindergarten, first, and second grades. A two-way MANOVA yielded significant main effects for grade, with significant differences on some measures evidenced between...

Journal: :Journal of the International Neuropsychological Society : JINS 2000
D A Pineda M Rosselli A Ardila S E Mejia M G Romero C Perez

The Boston Diagnostic Aphasia Examination Battery (BDAE) is one of the most widely used aphasia tests worldwide. Information about general population performance, however, is limited. This paper analyzes the effects of gender, age, socioeconomic status (SES), academic achievement, and occupation on the BDAE Spanish version. The BDAE was administered to a randomized sample of 156 occupationally ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1387

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