condition mean min max ZT0-3 2162.95 2162.95 2162.95 ZT4-7 1917.6 1917.6 1917.6 ZT8-11 1819.5500000000002 1819.5500000000002 1819.5500000000002 ZT12-15 1882.4499999999998 1882.4499999999998 1882.4499999999998 ZT16-19 2332.75 2332.75 2332.75 ZT20-23 2185.8 2185.8 2185.8