condition mean min max ZT0-3 0.011894225 0.0 0.02378845 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.02336325 0.02336325 0.02336325 ZT20-23 0.0 0.0 0.0