condition mean min max ZT0-3 8.200199999999999 8.200199999999999 8.200199999999999 ZT4-7 13.12105 13.12105 13.12105 ZT8-11 9.19965 9.19965 9.19965 ZT12-15 7.55391 7.55391 7.55391 ZT16-19 4.293895 4.293895 4.293895 ZT20-23 3.1715 3.1715 3.1715