condition mean min max ZT0-3 0.020580750000000002 0.020580750000000002 0.020580750000000002 ZT4-7 0.027497999999999998 0.027497999999999998 0.027497999999999998 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.023101333333333335 0.023101333333333335 0.023101333333333335