condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.011405125 0.0 0.02281025 ZT16-19 0.0453084 0.0453084 0.0453084 ZT20-23 0.0 0.0 0.0