condition mean min max ZT0-3 0.42924799999999996 0.42924799999999996 0.42924799999999996 ZT4-7 0.09638769999999999 0.09638769999999999 0.09638769999999999 ZT8-11 0.33945549999999997 0.33945549999999997 0.33945549999999997 ZT12-15 0.3388225 0.3388225 0.3388225 ZT16-19 0.8631056666666667 0.8631056666666667 0.8631056666666667 ZT20-23 0.505846 0.505846 0.505846