condition mean min max ZT0-3 91.6 91.6 91.6 ZT4-7 55.7 55.7 55.7 ZT8-11 51.550000000000004 51.550000000000004 51.550000000000004 ZT12-15 70.9 70.9 70.9 ZT16-19 105.55000000000001 105.55000000000001 105.55000000000001 ZT20-23 60.3 60.3 60.3