condition mean min max ZT0-3 38.55915 38.55915 38.55915 ZT4-7 51.650949999999995 51.650949999999995 51.650949999999995 ZT8-11 20.6751 20.6751 20.6751 ZT12-15 13.30325 13.30325 13.30325 ZT16-19 16.814100000000003 16.814100000000003 16.814100000000003 ZT20-23 24.174100000000003 24.174100000000003 24.174100000000003