condition mean min max ZT0-3 24.132625 23.2256 25.03965 ZT4-7 17.524900000000002 17.524900000000002 17.524900000000002 ZT8-11 18.128149999999998 18.128149999999998 18.128149999999998 ZT12-15 0 0 0 ZT16-19 28.1306 28.1306 28.1306 ZT20-23 20.046750000000003 20.046750000000003 20.046750000000003