condition mean min max ZT0-3 0.8420195 0.7285005 1.067495 ZT4-7 0.462217 0.462217 0.462217 ZT8-11 0.480502 0.480502 0.480502 ZT12-15 0.7963665 0.6604019999999999 0.932331 ZT16-19 0.1520735 0.1520735 0.1520735 ZT20-23 0.8608585 0.8608585 0.8608585