Table 2 Product user characteristics.
Age (X1) | Gender (X2) | Application (X3) | Usage features (X4) |
|---|---|---|---|
Age group 1 (X11) | Male (X21) | Application 1 (X31) | Features 1 (X41) |
Age group 2 (X12) | Application 2 (X32) | Features 2 (X42) | |
Age group 3 (X13) | Female (X16) | Application 3 (X33) | Features 3 (X43) |
… | … | … |
