condition mean min max ZT0-3 141.99233333333333 136.416 145.0455 ZT4-7 89.17425 89.17425 89.17425 ZT8-11 65.797 65.797 65.797 ZT12-15 101.71655 96.1121 107.321 ZT16-19 104.85235 104.85235 104.85235 ZT20-23 128.642 128.642 128.642