condition mean min max ZT0-3 922.0500000000001 922.0500000000001 922.0500000000001 ZT4-7 1007.4 1007.4 1007.4 ZT8-11 1001.4 1001.4 1001.4 ZT12-15 860.6 860.6 860.6 ZT16-19 784.55 784.55 784.55 ZT20-23 924.9 924.9 924.9