condition mean min max ZT0-3 1.47458775 1.1517805 1.797395 ZT4-7 1.0035049999999999 1.0035049999999999 1.0035049999999999 ZT8-11 0.765771 0.765771 0.765771 ZT12-15 0 0 0 ZT16-19 2.2203 2.2203 2.2203 ZT20-23 1.940815 1.940815 1.940815