condition mean min max ZT0-3 2268.8 2268.8 2268.8 ZT4-7 3197.2 3197.2 3197.2 ZT8-11 3968.5499999999997 3968.5499999999997 3968.5499999999997 ZT12-15 2709.45 2709.45 2709.45 ZT16-19 2249.6 2249.6 2249.6 ZT20-23 3175.15 3175.15 3175.15