condition mean min max ZT0-3 4682.200000000001 4682.200000000001 4682.200000000001 ZT4-7 2376.9 2376.9 2376.9 ZT8-11 2582.7 2582.7 2582.7 ZT12-15 2986.8999999999996 2986.8999999999996 2986.8999999999996 ZT16-19 3964.4500000000003 3964.4500000000003 3964.4500000000003 ZT20-23 4734.65 4734.65 4734.65