condition mean min max ZT0-3 2379.3 2379.3 2379.3 ZT4-7 2826.3 2826.3 2826.3 ZT8-11 2968.8999999999996 2968.8999999999996 2968.8999999999996 ZT12-15 2758.5 2758.5 2758.5 ZT16-19 2466.2 2466.2 2466.2 ZT20-23 2619.8500000000004 2619.8500000000004 2619.8500000000004