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Peer reviewedSerlin, Ronald C. – Journal of Experimental Education, 1993
Several new multiple comparison procedures are discussed in terms of their applicability to the problem of generating confidence intervals based on range null hypotheses to control the familywise Type 1 error in multiple sample experiments. These procedures seem fairly robust to violations of normality and homogeneity assumptions. (SLD)
Descriptors: Comparative Analysis, Hypothesis Testing, Robustness (Statistics), Sampling
Peer reviewedDavison, Mark L.; And Others – Applied Psychological Measurement, 1995
General normal ogive and logistic multiple-group models for paired comparisons data are described. In these models, scale value and discriminal dispersion parameters are allowed to vary across stimuli and respondent populations. Model fitting and hypothesis testing are illustrated using health care coverage data from two age groups. (SLD)
Descriptors: Age Differences, Comparative Analysis, Hypothesis Testing, Models
Download full textSchochet, Peter Z. – Mathematica Policy Research, Inc., 2008
Studies that examine the impacts of education interventions on key student, teacher, and school outcomes typically collect data on large samples and on many outcomes. In analyzing these data, researchers typically conduct multiple hypothesis tests to address key impact evaluation questions. Tests are conducted to assess intervention effects for…
Descriptors: Hypothesis Testing, Guidelines, Outcomes of Education, Evaluation Methods
Direct linkSaville, David J.; Rowarth, Jacqueline S. – Journal of Natural Resources and Life Sciences Education, 2008
This article reviews and discusses the use of statistical concepts in a natural resources and life sciences journal on the basis of a census of the articles published in a recent issue of the "Agronomy Journal" and presents a flow chart and a graph that display the inter-relationships between the most commonly used statistical terms. It also…
Descriptors: Flow Charts, Biological Sciences, Comparative Analysis, Natural Resources
Altink, Marieke E.; Arias-Vasquez, Alejandro; Franke, Barbara; Slaats-Willemse, Dorine I. E.; Buschgens, Cathelijne J. M.; Rommelse, Nanda N. J.; Fliers, Ellen A.; Anney, Richard; Brookes, Keeley-Joanne; Chen, Wai; Gill, Michael; Mulligan, Aisling; Sonuga-Barke, Edmund; Thompson, Margaret; Sergeant, Joseph A.; Faraone, Stephen V.; Asherson, Philip; Buitelaar, Jan K. – Journal of Child Psychology and Psychiatry, 2008
Background: The dopamine receptor D4 ("DRD4") 7-repeat allele and maternal smoking during pregnancy are both considered as risk factors in the aetiology of attention deficit hyperactivity disorder (ADHD), but few studies have been conducted on their interactive effects in causing ADHD. The purpose of this study is to examine the gene by…
Descriptors: Siblings, Smoking, Attention Deficit Hyperactivity Disorder, Pregnancy
Uchiyama, Tokio; Kurosawa, Michiko; Inaba, Yutaka – Journal of Autism and Developmental Disorders, 2007
It has been suggested that the measles, mumps, and rubella vaccine (MMR) is a cause of regressive autism. As MMR was used in Japan only between 1989 and 1993, this time period affords a natural experiment to examine this hypothesis. Data on 904 patients with autism spectrum disorders (ASD) were analyzed. During the period of MMR usage no…
Descriptors: Foreign Countries, Patients, Incidence, Autism
Emig, Christa – ProQuest LLC, 2009
The study sought to test the hypotheses that effective, guided discussions that facilitate meaningful dialogue about math anxiety would reduce levels of math anxiety in college algebra students, and would enhance course performance and course retention at a large community college in South Texas. The study was quantitative with a qualitative…
Descriptors: Intervention, Program Effectiveness, Mathematics Anxiety, Effect Size
Suarez, David F.; Ramirez, Francisco O.; Koo, Jeong-Woo – Sociology of Education, 2009
The UNESCO Associated Schools Project emphasizes world community, human rights, and international understanding. This article investigates the emergence and global diffusion of the project from 1953 to 2001, estimating the influence of national, regional, and world characteristics on the likelihood of a country adopting a UNESCO school. It also…
Descriptors: Civil Rights, Educational Innovation, Educational History, Models
Chatham, Kathy – 1999
Contrasts or comparisons can be used to investigate specific differences between means. Contrasts, as explained by B. Thompson (1985, 1994) are coding vectors that mathematically express hypotheses. The most basic categories of contrasts are planned and unplanned. The purpose of this paper is to explain the relative advantages of using planned…
Descriptors: Coding, Comparative Analysis, Correlation, Hypothesis Testing
Bennett, Richard P. – 1983
The results of a study of find alternative techniques for testing distributional normality are presented. A group of statistical techniques--some established and some new--were compared using empirical techniques. One new technique which appears to have higher power than the Lilliefors test was subjected to a better definition. Distributions under…
Descriptors: Comparative Analysis, Hypothesis Testing, Power (Statistics), Sample Size
Peer reviewedCooper, Martin – Educational and Psychological Measurement, 1975
A new test for increasing or decreasing trend in a set of observations is presented. Rather than making specific paired comparisons, as in the Cox and Stuart tests for trend, the user of the new test makes the comparisons of all possible pairs of observations. (Author)
Descriptors: Comparative Analysis, Hypothesis Testing, Nonparametric Statistics, Statistical Significance
Castner, Myra H.; And Others
A comparative study of first-grade reading instructional methods was undertaken with the support of the Granite School District Exemplary Center for Reading Instruction. This study was conducted in 19 schools of the district and involved approximately 1,295 students. Nine hypotheses concerning the various approaches used in reading instruction…
Descriptors: Comparative Analysis, Grade 1, Hypothesis Testing, Reading Instruction
Peer reviewedShine, Lester C., II – Educational and Psychological Measurement, 1977
A series of independent, normally distributed events may be broken into intervals on an a priori basis. Then, within interval variance may be compared to among interval variance. These might be considered short-term and long-term variances. This concept and a test for comparing variances are presented. (Author/JKS)
Descriptors: Analysis of Variance, Comparative Analysis, Hypothesis Testing, Intervals
Peer reviewedMartin, Charles C.; Games, Paul A. – Journal of Educational Statistics, 1977
Two potentially useful tests for homogeneity of variance--the jackknife test and the Box test--are described and compared. Recommendations for the use of these techniques and computational examples of each are provided. (Author/JKS)
Descriptors: Analysis of Variance, Comparative Analysis, Hypothesis Testing, Sampling
Peer reviewedLienart, G. A. – Educational and Psychological Measurement, 1972
The G Index is the difference between the frequencies of the homonymly assigned cells and heteronymly assigned cells in a four-fold contingency table. (Author/MB)
Descriptors: Comparative Analysis, Hypothesis Testing, Mathematical Applications, Statistical Analysis
