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Tests for correlations between sample size and taxonomic relative abundance are commonly used in zooarchaeological analyses to determine whether observed trends in relative abundance might simply be the result of sampling error.
As 63 participants completed the retest, the statistical tests for correlations had a very high power.
Internal consistency, one component of model reliability, tests for correlations among different items that constitute a PRO.
With 88 tests for correlations we would expect between four and five to show significant associations at the 5% level by chance alone.
As PPI analysis tests for correlations, and not causal influences, a caveat is that it cannot inform as to the directionality of the relationships involved.
Comparisons between groups were analyzed with Chi-square/Fishers exactestst-test/Mann-Witneyney U-test, ANOVA/Kruskal-Wallis and Pearson/Spearman tests for correlations depending on data distribution.
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Statistical power analyses using G*Power 3.1: Tests for correlation and regression analyses.
Faul, F., Erdfelder, E., Buchner, A. & Lang, A.-G. Statistical power analyses using G*Power 3.1: tests for correlation and regression analyses.
In addition, we conducted tests for correlation between the ranks with the help of Kendall's tau b coefficient.
To adjust the alpha level for multiple tests for correlation the Bonferroni method was used.
All parametric and nonparametric tests for correlation between coders were positive and highly significant.
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