condition mean min max ZT0-3 0.006080075 0.0 0.01216015 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.042380650000000006 0.0267709 0.057990400000000004 ZT16-19 0.06657365 0.050347333333333334 0.08279996666666667 ZT20-23 0 0 0