Table 4.

The Variance of Global Attenuation a ($\mathrm{dB}.\mathrm{c}{\mathrm{m}}^{-1}·\mathrm{MH}{\mathrm{z}}^{-\mathrm{b}}$) Between Repeated Images From 5 Participants for 6 Different Schemes

Variance of Global Attenuation Between Repeated Images
Schemes	1	2	3	4	5	6
Participant A	0.036	0.236	0.036	0.236	0.014	0.208
Participant B	0.863	0.340	0.863	0.340	0.026	6.897
Participant C	0.585	0.519	0.585	0.519	0.009	83.264
Participant D	0.369	0.420	0.369	0.420	0.002	1.495
Participant E	1.908	0.153	1.908	0.153	0.009	0.513