condition mean min max ZT0-3 0.6072913333333333 0.0759215 0.8774994999999999 ZT4-7 0.37415899999999996 0.37415899999999996 0.37415899999999996 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03901175 0.0 0.0780235 ZT16-19 0.666589 0.666589 0.666589 ZT20-23 1.086885 1.086885 1.086885