condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.039651 0.039651 0.039651 ZT12-15 0.04297575 0.0 0.0859515 ZT16-19 0.03829755 0.03829755 0.03829755 ZT20-23 0.0 0.0 0.0