condition mean min max ZT0-3 1001.8 1001.8 1001.8 ZT4-7 670.9 670.9 670.9 ZT8-11 658.4000000000001 658.4000000000001 658.4000000000001 ZT12-15 637.4 637.4 637.4 ZT16-19 759.3 759.3 759.3 ZT20-23 921.6 921.6 921.6