Table 7 The comparison between the size of the target customer sets identified by the Purchase Function against random target customer sets with the same number of customers likely to buy ${\mathit{p}}_{\mathit{i}}$

${\mathit{p}}_{\mathit{i}}$

$\mathbf{|}\mathit{T}{\mathit{C}}^{\mathbf{\ast }}\mathbf{|}$

|TC|

$\frac{\mathbf{|}\mathit{T}{\mathit{C}}_{\mathit{r}}\mathbf{|}}{\mathbf{|}\mathit{T}\mathit{C}\mathbf{|}}$