condition mean min max ZT0-3 34.1576 24.727 42.69745 ZT4-7 24.6604 24.6604 24.6604 ZT8-11 22.4989 22.4989 22.4989 ZT12-15 26.785400000000003 25.35725 28.21355 ZT16-19 31.543100000000003 31.543100000000003 31.543100000000003 ZT20-23 45.692099999999996 45.692099999999996 45.692099999999996