Figure 6
From: Owl-like plaques of the Copper Age and the involvement of children
(a) Boxplot showing the relationships between the number of perforations and owliness score of a random sample of slate plaques. Numbers inside the box represent sample sizes. (b) Relationship between children age and owliness score in a random sample of 100 drawings. The increasing size of multiple markers represents 1, 2, 4, 5, 6, 7 and 12 cases, respectively. Least squares regression line of the correlation is shown for graphical representation of trend.
