condition mean min max ZT0-3 0.4028075 0.0 0.805615 ZT4-7 4.02459 4.02459 4.02459 ZT8-11 4.054255 4.054255 4.054255 ZT12-15 0 0 0 ZT16-19 4.762925 4.762925 4.762925 ZT20-23 1.593545 1.593545 1.593545