condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.02244887116666667 0.02183346 0.023064282333333335 ZT8-11 0.06335613116666668 0.0 0.12671226233333335 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.021050305499999998 0.020804465999999997 0.021296145