condition mean min max ZT0-3 0.010927725 0.0 0.02185545 ZT4-7 0.0441154 0.0441154 0.0441154 ZT8-11 0.06768075 0.06768075 0.06768075 ZT12-15 0 0 0 ZT16-19 0.0440314 0.0440314 0.0440314 ZT20-23 0.04406755 0.04406755 0.04406755