condition mean min max ZT0-3 1.24954 1.24954 1.24954 ZT4-7 0.429916 0.429916 0.429916 ZT8-11 0.2737265 0.2737265 0.2737265 ZT12-15 0.522033 0.522033 0.522033 ZT16-19 0.7584845 0.7584845 0.7584845 ZT20-23 0.4963545 0.4963545 0.4963545