condition mean min max ZT0-3 0.36100224999999997 0.258725 0.46327949999999996 ZT4-7 0.37170585 0.37170585 0.37170585 ZT8-11 0.38030200000000003 0.38030200000000003 0.38030200000000003 ZT12-15 0 0 0 ZT16-19 0.0285212 0.0285212 0.0285212 ZT20-23 0.02848845 0.02848845 0.02848845