condition mean min max ZT0-3 1.62491 1.62491 1.62491 ZT4-7 0.8255375 0.8255375 0.8255375 ZT8-11 0.8006265 0.8006265 0.8006265 ZT12-15 1.2389715 1.2389715 1.2389715 ZT16-19 3.5875649999999997 3.5875649999999997 3.5875649999999997 ZT20-23 1.855295 1.855295 1.855295