Figure 8
The line graph titled Mean Silhouette Diagnostic presents the mean silhouette coefficient on the y axis, ranging from 0.0 to 0.7, and the number of groups on the x axis, ranging from 2 to 10. The graph shows data points for each number of groups, connected by a line. The mean silhouette coefficient starts at approximately 0.45 for 2 groups, increases to around 0.5 for 3 groups, and remains relatively stable around 0.5 for 4 and 5 groups. It then decreases to about 0.45 for 6 groups, drops further to approximately 0.4 for 7 groups, rises again to around 0.55 for 8 groups, and finally decreases to about 0.45 for 9 and 10 groups. All values are approximated.Silhouette analysis across candidate K-means solutions. The reported groupings are exploratory diagnostics, not validated occupational strata