condition mean min max ZT0-3 0.8017445 0.8017445 0.8017445 ZT4-7 0.5516225 0.5516225 0.5516225 ZT8-11 1.28342 1.28342 1.28342 ZT12-15 1.46036 1.46036 1.46036 ZT16-19 2.200345 2.200345 2.200345 ZT20-23 0.994983 0.994983 0.994983