condition mean min max ZT0-3 37.641099999999994 37.641099999999994 37.641099999999994 ZT4-7 28.3669 28.3669 28.3669 ZT8-11 26.01445 26.01445 26.01445 ZT12-15 30.57875 30.57875 30.57875 ZT16-19 40.199349999999995 40.199349999999995 40.199349999999995 ZT20-23 39.7959 39.7959 39.7959