condition mean min max ZT0-3 0.0250985 0.0 0.0752955 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.083007025 0.0429745 0.12303955 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0