condition mean min max ZT0-3 0.8814489999999999 0.8766035 0.8862945 ZT4-7 0.6825825 0.6825825 0.6825825 ZT8-11 0.408096 0.408096 0.408096 ZT12-15 0 0 0 ZT16-19 1.139523 1.139523 1.139523 ZT20-23 0.5398915 0.5398915 0.5398915