condition mean min max ZT0-3 0.9569403333333334 0.765485 1.149778 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1907795 0.1907795 0.1907795 ZT12-15 0.188576 0.186243 0.190909 ZT16-19 0.7263934999999999 0.7263934999999999 0.7263934999999999 ZT20-23 0.6182835 0.6182835 0.6182835