Fig. 5

a Distribution of 167 aesthetic index scores (\(s_{i \cdot }\)) for Overbrook—McArthur neighbourhood in 2013; b Distribution of \(Q_{s}\) for k = 5 randomly selected \(s_{i \cdot }\) from a, with density estimate (solid line) and density estimate from distribution of k = 4 randomly selected \(s_{i \cdot }\) from a (dotted line). Solid black circle is \(Q_{s}\) of all 167 \(s_{i \cdot }\) from a and solid black square are \(Q_{s}\) values from 2011 and 2012 (they are identical values at this scale of view). Star symbol is \(Q_{s}\) for 2012 extracted from 2013 \(s_{i \cdot }\) data at the audit the five audit locations of 2012 and likewise for the pentagon symbol for 2011. Grey bars in b represent the sample space greater than \(Q_{s}\) in 2011 and 2012