condition mean min max ZT0-3 64.2392 64.2392 64.2392 ZT4-7 43.26265 43.26265 43.26265 ZT8-11 28.58045 28.58045 28.58045 ZT12-15 40.897149999999996 40.897149999999996 40.897149999999996 ZT16-19 61.820949999999996 61.820949999999996 61.820949999999996 ZT20-23 70.80154999999999 70.80154999999999 70.80154999999999