condition mean min max ZT0-3 1.0190846666666666 0.64759 1.51002 ZT4-7 1.1792515000000001 1.1792515000000001 1.1792515000000001 ZT8-11 1.001069 1.001069 1.001069 ZT12-15 0.939311 0.937407 0.9412149999999999 ZT16-19 0.2074725 0.2074725 0.2074725 ZT20-23 0.355541 0.355541 0.355541