condition mean min max ZT0-3 860.0 860.0 860.0 ZT4-7 608.2 608.2 608.2 ZT8-11 544.4000000000001 544.4000000000001 544.4000000000001 ZT12-15 658.9 658.9 658.9 ZT16-19 882.95 882.95 882.95 ZT20-23 895.2 895.2 895.2