condition mean min max ZT0-3 0.020356652 0.0 0.040713304 ZT4-7 0.305728477 0.17288976 0.438567194 ZT8-11 0.4681681825 0.4519434095 0.48439295549999994 ZT12-15 0.67276735175 0.494213937 0.8513207665 ZT16-19 0.56572354475 0.40194242950000003 0.72950466 ZT20-23 1.102938481 1.057004542 1.14887242