condition mean min max ZT0-3 1339.25 1339.25 1339.25 ZT4-7 819.4 819.4 819.4 ZT8-11 776.75 776.75 776.75 ZT12-15 829.75 829.75 829.75 ZT16-19 1224.45 1224.45 1224.45 ZT20-23 1319.35 1319.35 1319.35