condition mean min max ZT0-3 2446.8500000000004 2446.8500000000004 2446.8500000000004 ZT4-7 2923.6 2923.6 2923.6 ZT8-11 2731.75 2731.75 2731.75 ZT12-15 2389.45 2389.45 2389.45 ZT16-19 2189.3500000000004 2189.3500000000004 2189.3500000000004 ZT20-23 2715.95 2715.95 2715.95