Statistical notes for clinical researchers: post-hoc multiple comparisons
نویسنده
چکیده
172 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Statistical notes for clinical researchers: post-hoc multiple comparisons Open lecture on statistics
منابع مشابه
Sample Size Considerations for Multiple Comparison Procedures in ANOVA
Adequate sample sizes for omnibus ANOVA tests do not necessarily provide sufficient statistical power for post hoc multiple comparisons typically performed following a significant omnibus F test. Results reported support a comparison-of-most-interest approach for sample size determination in ANOVA based on effect sizes for multiple comparisons. Introduction The determination of an appropriate s...
متن کاملNonparametric statistical analysis for multiple comparison of machine learning regression algorithms
In the paper we presented the guidelines for the application of nonparametric statistical tests and post hoc procedures devised to perform multiple comparisons of machine learning algorithms. We emphasized it is necessary to distinguish between pairwise and multiple comparison tests. We showed that the pairwise Wilcoxon test, when employed to multiple comparisons, would lead to overoptimistic c...
متن کاملStatistical Comparisons of Classifiers over Multiple Data Sets
While methods for comparing two learning algorithms on a single data set have been scrutinized for quite some time already, the issue of statistical tests for comparisons of more algorithms on multiple data sets, which is even more essential to typical machine learning studies, has been all but ignored. This article reviews the current practice and then theoretically and empirically examines se...
متن کاملAuthor's response to reviews Title: Diffusion Tensor Imaging Correlates with Lesion Volume in Cerebral Hemisphere Infarctions Authors:
1) My main concern is related to how the authors deal with the large number of statistical tests performed. The lack of corrections for multiple comparisons seems remiss and undermines the interpretations and validity of the results. For example, Table 2 shows the results from 52 correlation analyses, but the authors still regard an uncorrected p < .05 as statistically significant. Post-hoc cor...
متن کاملShould We Really Use Post-Hoc Tests Based on Mean-Ranks?
The statistical comparison of multiple algorithms over multiple data sets is fundamental in machine learning. This is typically carried out by the Friedman test. When the Friedman test rejects the null hypothesis, multiple comparisons are carried out to establish which are the significant differences among algorithms. The multiple comparisons are usually performed using the mean-ranks test. The...
متن کامل