condition mean min max ZT0-3 54.681462 54.681462 54.681462 ZT4-7 61.1435355 61.1435355 61.1435355 ZT8-11 55.829358 55.829358 55.829358 ZT12-15 62.8563375 62.8563375 62.8563375 ZT16-19 84.8151305 84.8151305 84.8151305 ZT20-23 74.9386475 74.9386475 74.9386475