condition mean min max ZT0-3 621.9501 621.9501 621.9501 ZT4-7 514.349983 514.349983 514.349983 ZT8-11 575.1090595000001 575.1090595000001 575.1090595000001 ZT12-15 663.7624625000001 663.7624625000001 663.7624625000001 ZT16-19 687.7053424999999 687.7053424999999 687.7053424999999 ZT20-23 758.6527619999999 758.6527619999999 758.6527619999999