condition mean min max ZT0-3 3.65588 3.39673 3.91503 ZT4-7 6.878 6.878 6.878 ZT8-11 15.1775 15.1775 15.1775 ZT12-15 0 0 0 ZT16-19 9.626835 9.626835 9.626835 ZT20-23 3.3830150000000003 3.3830150000000003 3.3830150000000003