condition mean min max ZT0-3 3247.5 3247.5 3247.5 ZT4-7 7126.5 7126.5 7126.5 ZT8-11 5570.5 5570.5 5570.5 ZT12-15 3262.8500000000004 3262.8500000000004 3262.8500000000004 ZT16-19 2317.8 2317.8 2317.8 ZT20-23 2382.35 2382.35 2382.35