Semiochemical Diversity in Practice: Antiattractant Semiochemicals Reduce Bark Beetle Attacks on Standing Trees—A First Meta-Analysis
Figure 3
Plots to check normality and heterogeneity of effect size in the whole data set () [29]. (a) Weighted box plot (data points used weighted by division of SE, vertical line is median, box enclose 50% of observations, whiskers 2 SD or 95% of observations, “o” are outliers not enclosed by whiskers, and “*” extremes), where asymmetry indicates heterogeneity and deviations from normality. Numbers near points correspond to the “Expt nr” in Table 1. (b) Histogram of residuals (data-grand mean)/SD allowing check of normality. (c) Normal Quantile Plot of Z-scores (normalised data by subtraction of mean and division by SD), allowing check of normality and of outliers contributing to heterogeneity.
