condition mean min max ZT0-3 4.0202825 3.261825 4.77874 ZT4-7 4.635575 4.635575 4.635575 ZT8-11 2.58386 2.58386 2.58386 ZT12-15 0 0 0 ZT16-19 2.684805 2.684805 2.684805 ZT20-23 2.89107 2.89107 2.89107