condition mean min max ZT0-3 1293.073333 1293.073333 1293.073333 ZT4-7 1653.291111 1653.291111 1653.291111 ZT8-11 1143.1550001 1143.1550001 1143.1550001 ZT12-15 694.5 694.5 694.5 ZT16-19 1015.1688889000001 1015.1688889000001 1015.1688889000001 ZT20-23 991.1722223333334 991.1722223333334 991.1722223333334