condition mean min max ZT0-3 0.2205595 0.0 0.441119 ZT4-7 0.4349195 0.4349195 0.4349195 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.433235 0.433235 0.433235 ZT20-23 0.0 0.0 0.0