Figure 2.

Variation in knowledge level by school, illustrated by the posterior empirical bayes estimates of the random effects for each school rank (squares), with their 95%confidence intervals. Red horizontal line indicates the level for the average school; if an interval does not intersect with the red line, the corresponding school differs significantly from the average.

Beaujean et al. BMC Public Health 2013 13:1148   doi:10.1186/1471-2458-13-1148
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