condition mean min max ZT0-3 41.262297 41.262297 41.262297 ZT4-7 43.681256000000005 43.681256000000005 43.681256000000005 ZT8-11 46.8225075 46.8225075 46.8225075 ZT12-15 35.371321 35.371321 35.371321 ZT16-19 50.7005215 50.7005215 50.7005215 ZT20-23 55.5842435 55.5842435 55.5842435