condition mean min max ZT0-3 0.16331116666666667 0.153577 0.1724215 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.41053825 0.3162195 0.504857 ZT16-19 0.59043 0.59043 0.59043 ZT20-23 0.0 0.0 0.0