condition mean min max ZT0-3 0.89185525 0.671665 1.1120455 ZT4-7 0.6714225 0.6714225 0.6714225 ZT8-11 1.653365 1.653365 1.653365 ZT12-15 0 0 0 ZT16-19 2.069805 2.069805 2.069805 ZT20-23 1.50704 1.50704 1.50704