condition mean min max ZT0-3 151.57595 151.57595 151.57595 ZT4-7 161.594803 161.594803 161.594803 ZT8-11 155.755361 155.755361 155.755361 ZT12-15 104.088995 104.088995 104.088995 ZT16-19 192.91261550000002 192.91261550000002 192.91261550000002 ZT20-23 202.37938250000002 202.37938250000002 202.37938250000002