condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.556025 0.556025 0.556025 ZT8-11 0.56514 0.56514 0.56514 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.59357 0.59357 0.59357