condition mean min max ZT0-3 0.36625375000000004 0.2744595 0.458048 ZT4-7 0.740704 0.740704 0.740704 ZT8-11 1.748235 1.748235 1.748235 ZT12-15 0 0 0 ZT16-19 1.3510065 1.3510065 1.3510065 ZT20-23 0.180448 0.180448 0.180448