Testing differences in proportions
نویسندگان
چکیده
منابع مشابه
Testing differences in proportions.
This paper is the sixth in a series of statistics articles recently published by Australian Critical Care. In this paper we explore the most commonly used statistical tests to compare groups of data at the nominal level of measurement. The chosen statistical tests are the chi-square test, chi-square test for goodness of fit, chi-square test for independence, Fisher's exact test, McNemar's test ...
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T he process of drawing conclusions about an entire population on the basis of the information contained in a random sample drawn from that population is known as statistical inference. Methods of statistical inference fall into 2 general categories: estimation and hypothesis testing. With estimation, our goal is to describe or estimate some characteristic of a population of interest, such as t...
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Most clinical trials contain tests on proportions, usually they are answered by means of the Frequentist approach, nevertheless another valid option could be to solve them using a Bayesian approach. The Bayesian approach has the advantage that it is not restricted to only one alternative hypothesis. Moreover, the hypotheses to be tested do not necessarily overlap. In this paper we show a SAS® m...
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The problem of hypothesis testing about proportions in two nite populationsis addressed.The usual test based on the normal approximation (Z test) and a test based on estimatedp values (E test) are considered. The exact properties of the tests are evaluated numerically. Numerical studies indicate that the E test is very satisfactory even for small samples and can be recommended for practical u...
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ژورنال
عنوان ژورنال: Australian Critical Care
سال: 2011
ISSN: 1036-7314
DOI: 10.1016/j.aucc.2011.01.005