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The Comparative Method - Political Science

a) are matched on many variables that are nor central to the study, thus in effect .controlling' for variables; and b) differ in terms of the key variables that are the focus of analysis, thereby allowing a more adequate assesstnent of their influence. Hence, the selection Of Cases acts as a partial substitute for statistical or control.

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Training in Methodology and Formal Theory - …

polisci.berkeley.edu

and helped to sustain its innovative research on survey methodology; and they were central ... Berkeley’s Institute of ... Training in Methodology and Formal Theory

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Understanding Process Tracing - Political Science

polisci.berkeley.edu

tion in process tracing sometimes relies on quantitative data. Thisiscertainlyreasonable,giventhat—inthespiritofpursu- ing multi-method research—the boundary between qualitative

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Essentially contested concepts: Debates and applications

polisci.berkeley.edu

‘essentially contested concepts’ in an essay of that title published in 1956.6 This essay is the central focus of the present analysis. His ideas are likewise developed in ‘Art as an Essentially Contested Concept’,7 published in the same year, and a few refinements in his arguments are included in his subsequent book,

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Classification and regression trees

pages.stat.wisc.edu

selection bias affects the integrity of inferences drawn ... into more than two child nodes. Second, owing to the sequential nature of the tests and the inexactness of ... are many variables with little or no predictive power: their introduction can substantially reduce the size of

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Quantitative Research Designs: Experimental, Quasi ...

samples.jbpub.com

problem of selection bias so that comparable, balanced groups of similar size are ... after observations on the same subject). 2 Interval/ratio One-way analysis of variance (ANOVA) F To test the difference among means of more than two independent groups for one independent variable (with more than one level). More than two groups

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Chapter 335 Ridge Regression - NCSS

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matter what sampling technique is used. Many manufacturing or service processes have constraints on independent variables (as to their range), either physically, politically, or legally, which will create multicollinearity. 3. Over-defined model. Here, there are more variables than observations. This situation should be avoided.

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Quasi-Experimental Design and Methods

www.unicef-irc.org

more than 0.8. So, in establishing the region of common support, the 39 per cent of comparison group observations with a propensity score of 0 to 0.3 are ignored, along with the 19 per cent of treatment group observations with a propensity score of 0.8 to 1. (In practice, a …

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Logistic Regression in Rare Events Data

gking.harvard.edu

more observations and better variables, enabling scholars to focus data collection efforts where they matter most. As an example, we use all dyads (pairs of countries) for each year since World War II to generate a data set below with 303,814 observations, of which only 0.34%, or 1042 dyads, were at war.

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Fundamentals of Hierarchical Linear and Multilevel Modeling

www.sagepub.com

than is possible with regression or other general linear model (GLM) methods. 2.Hierarchical effects: For when predictor variables are measured at more than one level (ex., reading achievement scores at the student level and teacher–student ratios at the school level; or sentencing lengths at the offender level, gender of

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Strategies for Teaching Science Content Reading

files.eric.ed.gov

questions. I emphasize to them that questions are more important than answers. An educated mind is not built upon a foundation of static knowledge. Instead, it is continuously under construction through the gifts of curiosity and wonderment. It has been my observation over the past four decades that many students have

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The FREQ Procedure - SAS

support.sas.com

students that correspond to each combination of data values. The double at sign (@@) indicates that more than one observation is included on a single data line. In this DATA step, two observations are included on each line. Researchers are interested in whether there is an association between internship status and summer program enrollment.

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THE EDUCATIONAL IMPACT OF ONLINE LEARNING

www.faculty.wwu.edu

same quarter.7 Online courses are defined by the university as containing more than 75% of instructional time conducted via the internet or web-based delivery methods. 8 We define Online as a binary variable equal to unity if the section was taught online and zero otherwise.

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