condition mean min max ZT0-3 98.881628 98.881628 98.881628 ZT4-7 72.6601605 72.6601605 72.6601605 ZT8-11 78.8196815 78.8196815 78.8196815 ZT12-15 85.5503855 85.5503855 85.5503855 ZT16-19 108.51066900000001 108.51066900000001 108.51066900000001 ZT20-23 130.7365575 130.7365575 130.7365575