condition mean min max ZT0-3 463.6 463.6 463.6 ZT4-7 428.9 428.9 428.9 ZT8-11 489.70000000000005 489.70000000000005 489.70000000000005 ZT12-15 578.7 578.7 578.7 ZT16-19 650.35 650.35 650.35 ZT20-23 574.45 574.45 574.45