condition mean min max ZT0-3 58.650000000000006 58.650000000000006 58.650000000000006 ZT4-7 44.3 44.3 44.3 ZT8-11 39.1 39.1 39.1 ZT12-15 46.550000000000004 46.550000000000004 46.550000000000004 ZT16-19 98.69999999999999 98.69999999999999 98.69999999999999 ZT20-23 43.050000000000004 43.050000000000004 43.050000000000004