condition mean min max ZT0-3 680.924364 680.924364 680.924364 ZT4-7 530.1207555 530.1207555 530.1207555 ZT8-11 464.6149345 464.6149345 464.6149345 ZT12-15 525.9734225 525.9734225 525.9734225 ZT16-19 555.8207970000001 555.8207970000001 555.8207970000001 ZT20-23 557.8372285 557.8372285 557.8372285