condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0263082 0.0263082 0.0263082 ZT8-11 0.025401000000000003 0.025401000000000003 0.025401000000000003 ZT12-15 0.0321955 0.0 0.064391 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0