Fig. 6From: Chemical surveillance in freshwaters: small sample sizes underestimate true pollutant loads and fail to detect environmental quality standard exceedancesSample size simulation for the weekly composite samples of 4-tert-octylphenol. The distribution of the 100,000 randomly sampled and calculated sample means of 4-tert-octylphenol per chosen sub-sample size is shown as boxplotsBack to article page