condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.027336409000000002 0.010120956 0.044551862000000005 ZT12-15 0.31939864025 0.2242804625 0.414516818 ZT16-19 0.3799518375 0.358240452 0.401663223 ZT20-23 0.348971641 0.319520591 0.37842269100000003