condition mean min max ZT0-3 1.2931349525 1.0822338839999999 1.504036021 ZT4-7 1.1508684917499998 0.6557426295 1.645994354 ZT8-11 3.73398168775 2.6166748555000003 4.85128852 ZT12-15 5.65989170725 5.4393187605 5.880464654 ZT16-19 7.34694032525 7.3462292945000005 7.347651356 ZT20-23 7.08121473325 6.74964179 7.4127876765