condition mean min max ZT0-3 823.5999999999999 823.5999999999999 823.5999999999999 ZT4-7 876.7 876.7 876.7 ZT8-11 1123.05 1123.05 1123.05 ZT12-15 826.8 826.8 826.8 ZT16-19 748.95 748.95 748.95 ZT20-23 957.7 957.7 957.7