condition mean min max ZT0-3 0.013336816666666668 0.0 0.04001045 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03826325 0.0 0.0765265 ZT16-19 0.18401255 0.18401255 0.18401255 ZT20-23 0.04180345 0.04180345 0.04180345