condition mean min max ZT0-3 0.99767125 0.8793175 1.116025 ZT4-7 0.4506785 0.4506785 0.4506785 ZT8-11 1.373735 1.373735 1.373735 ZT12-15 0 0 0 ZT16-19 1.1703649999999999 1.1703649999999999 1.1703649999999999 ZT20-23 1.1721235 1.1721235 1.1721235