condition mean min max ZT0-3 2117.6 2117.6 2117.6 ZT4-7 4320.8 4320.8 4320.8 ZT8-11 4676.05 4676.05 4676.05 ZT12-15 4147.950000000001 4147.950000000001 4147.950000000001 ZT16-19 2925.5 2925.5 2925.5 ZT20-23 2510.15 2510.15 2510.15