condition mean min max ZT0-3 0.06602573066666667 0.0 0.13205146133333334 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0101805275 0.0 0.020361055 ZT12-15 0.0125869665 0.0 0.025173933 ZT16-19 0.0 0.0 0.0 ZT20-23 0.054260460499999996 0.04259229033333333 0.06592863066666667