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Fig. 4 | BMC Medical Research Methodology

Fig. 4

From: Measuring inter-rater reliability for nominal data – which coefficients and confidence intervals are appropriate?

Fig. 4

Empirical coverage probability for the bootstrap intervals for Krippendorff’s alpha and Fleiss’ K with varying factors sample size (a), number of categories (b), number of raters (c) and strength of agreement (d). In each subplot, summary results over all levels of the other factors are displayed. The dashed line indicates the theoretical coverage probability of 95 %

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