condition mean min max ZT0-3 0.516995 0.416425 0.5708260000000001 ZT4-7 0.300153 0.300153 0.300153 ZT8-11 0.3745275 0.3745275 0.3745275 ZT12-15 1.1337015000000001 0.922378 1.3450250000000001 ZT16-19 1.750585 1.750585 1.750585 ZT20-23 1.2009249999999998 1.2009249999999998 1.2009249999999998