condition mean min max ZT0-3 13.563166666666666 0.0 29.16575 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 24.52285 24.52285 24.52285