condition mean min max ZT0-3 5.10261 0.0 10.20522 ZT4-7 0.0 0.0 0.0 ZT8-11 7.03705 7.03705 7.03705 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 6.83716 6.83716 6.83716