condition mean min max ZT0-3 0.044323 0.0 0.132969 ZT4-7 0.252136 0.252136 0.252136 ZT8-11 0.0646375 0.0646375 0.0646375 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0