condition mean min max ZT0-3 21.212019 21.212019 21.212019 ZT4-7 21.02068 21.02068 21.02068 ZT8-11 20.2383015 20.2383015 20.2383015 ZT12-15 42.791844 42.791844 42.791844 ZT16-19 20.788144000000003 20.788144000000003 20.788144000000003 ZT20-23 23.4341945 23.4341945 23.4341945