condition mean min max ZT0-3 13.7661 13.7661 13.7661 ZT4-7 10.41987 10.41987 10.41987 ZT8-11 12.081299999999999 12.081299999999999 12.081299999999999 ZT12-15 12.96955 12.96955 12.96955 ZT16-19 15.540400000000002 15.540400000000002 15.540400000000002 ZT20-23 12.81865 12.81865 12.81865