condition mean min max ZT0-3 0.07947005 0.07947005 0.07947005 ZT4-7 0.09713854999999999 0.09713854999999999 0.09713854999999999 ZT8-11 0.017638050000000002 0.017638050000000002 0.017638050000000002 ZT12-15 0.05515655 0.05515655 0.05515655 ZT16-19 0.03668483 0.03668483 0.03668483 ZT20-23 0.0923974 0.0923974 0.0923974