condition mean min max ZT0-3 1402.342494 1402.342494 1402.342494 ZT4-7 1364.7732185 1364.7732185 1364.7732185 ZT8-11 1325.7380480000002 1325.7380480000002 1325.7380480000002 ZT12-15 1482.7806154999998 1482.7806154999998 1482.7806154999998 ZT16-19 1421.5489969999999 1421.5489969999999 1421.5489969999999 ZT20-23 1140.461116 1140.461116 1140.461116