condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.071097 0.0 0.142194 ZT16-19 0.0630025 0.0630025 0.0630025 ZT20-23 0.0 0.0 0.0