condition mean min max ZT0-3 1033.539749 1033.539749 1033.539749 ZT4-7 1305.157633 1305.157633 1305.157633 ZT8-11 1504.9465215 1504.9465215 1504.9465215 ZT12-15 1216.028096 1216.028096 1216.028096 ZT16-19 1404.1875805 1404.1875805 1404.1875805 ZT20-23 1718.819144 1718.819144 1718.819144