condition mean min max ZT0-3 184.19733333333332 140.5425 220.98149999999998 ZT4-7 212.0575 212.0575 212.0575 ZT8-11 108.15700000000001 108.15700000000001 108.15700000000001 ZT12-15 87.165175 72.06315000000001 102.2672 ZT16-19 117.7365 117.7365 117.7365 ZT20-23 174.099 174.099 174.099