condition mean min max ZT0-3 1338.75 1338.75 1338.75 ZT4-7 5995.8 5995.8 5995.8 ZT8-11 5491.3 5491.3 5491.3 ZT12-15 2455.6 2455.6 2455.6 ZT16-19 665.5 665.5 665.5 ZT20-23 220.5 220.5 220.5