condition mean min max ZT0-3 1476.658122 1476.658122 1476.658122 ZT4-7 2396.23272 2396.23272 2396.23272 ZT8-11 2328.25981 2328.25981 2328.25981 ZT12-15 1573.2850105 1573.2850105 1573.2850105 ZT16-19 824.1577895 824.1577895 824.1577895 ZT20-23 761.9911815 761.9911815 761.9911815