condition mean min max ZT0-3 0.0280595 0.0 0.056119 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.040160383333333334 0.0 0.08032076666666667 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0