condition mean min max ZT0-3 0.0350234 0.0350234 0.0350234 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.03549485 0.03549485 0.03549485 ZT20-23 0.0355749 0.0355749 0.0355749