condition mean min max ZT0-3 0.18187023575 0.118936846 0.24480362549999998 ZT4-7 0.21709601975 0.13247533150000002 0.301716708 ZT8-11 0.96668206425 0.8523234795 1.081040649 ZT12-15 0.8426175767499999 0.7558281585 0.929406995 ZT16-19 0.989058851 0.826608305 1.151509397 ZT20-23 1.4971650374999999 1.435886187 1.558443888