condition mean min max ZT0-3 4402.8 4402.8 4402.8 ZT4-7 3313.6 3313.6 3313.6 ZT8-11 3134.25 3134.25 3134.25 ZT12-15 1987.85 1987.85 1987.85 ZT16-19 1680.65 1680.65 1680.65 ZT20-23 3006.9 3006.9 3006.9