condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.071416 0.071416 0.071416 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03618025 0.0 0.0723605 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0