condition mean min max ZT0-3 2916.2 2916.2 2916.2 ZT4-7 1948.6 1948.6 1948.6 ZT8-11 2043.15 2043.15 2043.15 ZT12-15 2388.7 2388.7 2388.7 ZT16-19 2919.8999999999996 2919.8999999999996 2919.8999999999996 ZT20-23 2980.5 2980.5 2980.5