condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 4.16309 4.16309 4.16309 ZT12-15 2.30074 0.0 4.60148 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0