condition mean min max ZT0-3 33.161699999999996 33.161699999999996 33.161699999999996 ZT4-7 25.7712 25.7712 25.7712 ZT8-11 26.88095 26.88095 26.88095 ZT12-15 36.15475 36.15475 36.15475 ZT16-19 34.7671 34.7671 34.7671 ZT20-23 29.2224 29.2224 29.2224