condition mean min max ZT0-3 50.050000000000004 50.050000000000004 50.050000000000004 ZT4-7 56.4 56.4 56.4 ZT8-11 80.30000000000001 80.30000000000001 80.30000000000001 ZT12-15 110.30000000000001 110.30000000000001 110.30000000000001 ZT16-19 51.05 51.05 51.05 ZT20-23 66.1 66.1 66.1