condition mean min max ZT0-3 12648.7 12648.7 12648.7 ZT4-7 13439.6 13439.6 13439.6 ZT8-11 14521.75 14521.75 14521.75 ZT12-15 12891.45 12891.45 12891.45 ZT16-19 10944.8 10944.8 10944.8 ZT20-23 11720.05 11720.05 11720.05