condition mean min max ZT0-3 0.6476483574999999 0.6279391169999999 0.6673575979999999 ZT4-7 0.5801034469999999 0.426127147 0.734079747 ZT8-11 0.7015517735 0.6993040355 0.7037995115 ZT12-15 0.5992089380000001 0.4962515445000001 0.7021663315 ZT16-19 0.7269158307499999 0.446513434 1.0073182274999999 ZT20-23 1.0617936945 1.009519423 1.114067966