condition mean min max ZT0-3 0.3068455 0.3068455 0.3068455 ZT4-7 0.1005959 0.1005959 0.1005959 ZT8-11 0.158955 0.158955 0.158955 ZT12-15 0.41593650000000004 0.41593650000000004 0.41593650000000004 ZT16-19 0.8454615000000001 0.8454615000000001 0.8454615000000001 ZT20-23 0.7872055 0.7872055 0.7872055