condition mean min max ZT0-3 60.79505 60.79505 60.79505 ZT4-7 62.7418 62.7418 62.7418 ZT8-11 35.5689 35.5689 35.5689 ZT12-15 28.758 28.758 28.758 ZT16-19 40.3866 40.3866 40.3866 ZT20-23 55.334450000000004 55.334450000000004 55.334450000000004