condition mean min max ZT0-3 930.51475 837.156 1023.8735 ZT4-7 566.5165 566.5165 566.5165 ZT8-11 1279.7350000000001 1279.7350000000001 1279.7350000000001 ZT12-15 0 0 0 ZT16-19 1680.48 1680.48 1680.48 ZT20-23 1315.625 1315.625 1315.625