condition mean min max ZT0-3 0.023481949999999998 0.0 0.0353721 ZT4-7 0.03220805 0.03220805 0.03220805 ZT8-11 0.0339332 0.0339332 0.0339332 ZT12-15 0.55418075 0.1875325 0.920829 ZT16-19 0.478484 0.478484 0.478484 ZT20-23 0.0739145 0.0739145 0.0739145