condition mean min max ZT0-3 2924.9 2924.9 2924.9 ZT4-7 1897.3 1897.3 1897.3 ZT8-11 2008.0 2008.0 2008.0 ZT12-15 1930.8 1930.8 1930.8 ZT16-19 2388.6000000000004 2388.6000000000004 2388.6000000000004 ZT20-23 2845.9 2845.9 2845.9