condition mean min max ZT0-3 609.75 609.75 609.75 ZT4-7 648.5 648.5 648.5 ZT8-11 825.25 825.25 825.25 ZT12-15 845.1 845.1 845.1 ZT16-19 784.9000000000001 784.9000000000001 784.9000000000001 ZT20-23 660.7 660.7 660.7