Read e-book online An Introduction to Categorical Data Analysis (Wiley Series PDF

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By Alan Agresti

ISBN-10: 0471226181

ISBN-13: 9780471226185

Praise for the 1st Edition
"This is an excellent textual content from which to coach specific facts research, at various degrees. . . [t]his booklet will be very hugely recommended."
Short booklet Reviews
"Of nice curiosity to strength readers is the diversity of fields which are represented within the examples: future health care, monetary, govt, product advertising, and activities, to call a few."
Journal of caliber Technology
"Alan Agresti has written one other incredible account of the research of express data."
—The Statistician
The use of statistical tools for express facts is ever expanding in today's global. An creation to express facts research, moment Edition presents an utilized advent to an important equipment for interpreting express facts. This new version summarizes tools that experience lengthy performed a well known function in information research, similar to chi-squared exams, and likewise locations precise emphasis on logistic regression and different modeling options for univariate and correlated multivariate specific responses.
This moment variation features:* new chapters at the tools for clustered info, with an emphasis on generalized estimating equations (GEE) and random results versions* A unified viewpoint in accordance with generalized linear types* An emphasis on logistic regression modeling* An appendix that demonstrates using SAS(r) for all tools* An interesting ancient point of view at the improvement of the tools* really expert tools for ordinal information, small samples, multicategory information, and paired pairs* greater than a hundred analyses of genuine info units and approximately three hundred exercises
Written in an utilized, nontechnical sort, the ebook illustrates equipment utilizing a wide selection of actual facts, together with scientific medical trials, drug use via young ones, basketball taking pictures, horseshoe crab mating, environmental reviews, correlates of happiness, and lots more and plenty more.
An creation to specific info research, moment Edition is a useful device for social, behavioral, and biomedical scientists, in addition to researchers in public well-being, advertising, schooling, organic and agricultural sciences, and commercial quality controls.

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Additional resources for An Introduction to Categorical Data Analysis (Wiley Series in Probability and Statistics)

Example text

Two groups with sample proportions p1 and p2 have a sample relative risk of p1 /p2 . 82. The sample proportion of MI cases was 82% higher for the group taking placebo. 008 makes it seem as if the two groups differ by a trivial amount. By contrast, the relative risk shows that the difference may have important public health implications. Using the difference of proportions alone to compare two groups can be misleading when the proportions are both close to zero. The sampling distribution of the sample relative risk is highly skewed unless the sample sizes are quite large.

Of 893 respondents to this question in 2002, 400 replied “yes” and 493 replied “no”. 448. 0167. 002. 50, that is, that fewer than half of Americans favored legal abortion in this situation. In some other situations, such as when the mother’s health was endangered, an overwhelming majority favored legalized abortion. Responses depended strongly on the question wording. 50) is plausible. We learn more by constructing a confidence interval to determine the range of plausible values. Let SE denote the estimated standard error of p.

011. 011. The actual probability of type I error is much smaller than the intended one. This illustrates an awkward aspect of significance testing when the test statistic has a discrete distribution. For test statistics having a continuous distribution, the P -value has a uniform null distribution over the interval [0, 1]. That is, when H0 is true, the P -value is equally likely to fall anywhere between 0 and 1. 50. 50. 010, . . 001. 2. 59 In this average sense, P -values for discrete distributions tend to be too large.

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An Introduction to Categorical Data Analysis (Wiley Series in Probability and Statistics) by Alan Agresti

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