condition mean min max ZT0-3 112.931248 112.931248 112.931248 ZT4-7 79.45948000000001 79.45948000000001 79.45948000000001 ZT8-11 107.2490185 107.2490185 107.2490185 ZT12-15 138.531677 138.531677 138.531677 ZT16-19 96.303353 96.303353 96.303353 ZT20-23 104.3494015 104.3494015 104.3494015