condition mean min max ZT0-3 17819.5 17819.5 17819.5 ZT4-7 13107.1 13107.1 13107.1 ZT8-11 12848.599999999999 12848.599999999999 12848.599999999999 ZT12-15 15757.2 15757.2 15757.2 ZT16-19 18715.5 18715.5 18715.5 ZT20-23 16977.95 16977.95 16977.95