condition mean min max ZT0-3 19.22345 19.22345 19.22345 ZT4-7 13.428049999999999 13.428049999999999 13.428049999999999 ZT8-11 10.63035 10.63035 10.63035 ZT12-15 12.55835 12.55835 12.55835 ZT16-19 17.95525 17.95525 17.95525 ZT20-23 19.3174 19.3174 19.3174