condition mean min max ZT0-3 1.19000629525 1.1676619755 1.212350615 ZT4-7 0.46980505475 0.44785315649999996 0.491756953 ZT8-11 0.712419351 0.41681140699999997 1.008027295 ZT12-15 3.1774199805 1.7731434075 4.5816965535 ZT16-19 3.90787901275 3.5584842665 4.257273759 ZT20-23 5.07477980225 4.5518625735 5.597697031