condition mean min max ZT0-3 2511.2 2511.2 2511.2 ZT4-7 2133.9 2133.9 2133.9 ZT8-11 1993.05 1993.05 1993.05 ZT12-15 2551.55 2551.55 2551.55 ZT16-19 2244.15 2244.15 2244.15 ZT20-23 2305.3 2305.3 2305.3