condition mean min max ZT0-3 32.109352 32.109352 32.109352 ZT4-7 91.2193725 91.2193725 91.2193725 ZT8-11 125.96155000000002 125.96155000000002 125.96155000000002 ZT12-15 52.8197775 52.8197775 52.8197775 ZT16-19 27.1850125 27.1850125 27.1850125 ZT20-23 16.2809995 16.2809995 16.2809995