condition mean min max ZT0-3 0.11985566666666668 0.0 0.359567 ZT4-7 0.0 0.0 0.0 ZT8-11 0.3234755 0.3234755 0.3234755 ZT12-15 0.67075025 0.56674 0.7747605 ZT16-19 0.941375 0.941375 0.941375 ZT20-23 0.0 0.0 0.0