condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.007167799999999999 0.007167799999999999 0.007167799999999999 ZT12-15 0.028913454166666665 0.024250833333333333 0.033576075 ZT16-19 0.014502500000000002 0.010936933333333334 0.018068066666666667 ZT20-23 0 0 0