condition mean min max ZT0-3 1352.221597 1352.221597 1352.221597 ZT4-7 1526.006317 1526.006317 1526.006317 ZT8-11 1489.753263 1489.753263 1489.753263 ZT12-15 1675.3251679999998 1675.3251679999998 1675.3251679999998 ZT16-19 1801.2212155 1801.2212155 1801.2212155 ZT20-23 1699.6130445 1699.6130445 1699.6130445