condition mean min max ZT0-3 117.966733 117.966733 117.966733 ZT4-7 89.53929550000001 89.53929550000001 89.53929550000001 ZT8-11 82.2095465 82.2095465 82.2095465 ZT12-15 128.622155 128.622155 128.622155 ZT16-19 114.6477505 114.6477505 114.6477505 ZT20-23 84.7169695 84.7169695 84.7169695