condition mean min max ZT0-3 2050.2 2050.2 2050.2 ZT4-7 2515.8 2515.8 2515.8 ZT8-11 2300.05 2300.05 2300.05 ZT12-15 2363.05 2363.05 2363.05 ZT16-19 1974.05 1974.05 1974.05 ZT20-23 1714.65 1714.65 1714.65