condition mean min max ZT0-3 46.3898 46.3898 46.3898 ZT4-7 44.36915 44.36915 44.36915 ZT8-11 38.63685 38.63685 38.63685 ZT12-15 36.2462 36.2462 36.2462 ZT16-19 47.8909 47.8909 47.8909 ZT20-23 59.717 59.717 59.717