condition mean min max ZT0-3 800.4425 758.88 842.005 ZT4-7 426.461 426.461 426.461 ZT8-11 563.891 563.891 563.891 ZT12-15 0 0 0 ZT16-19 622.2629999999999 622.2629999999999 622.2629999999999 ZT20-23 625.1935000000001 625.1935000000001 625.1935000000001