condition mean min max ZT0-3 0.03210416666666666 0.0 0.0963125 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.01225775 0.0 0.0245155 ZT16-19 0.1129935 0.1129935 0.1129935 ZT20-23 0.0603265 0.0603265 0.0603265