condition mean min max ZT0-3 1229.2435 1056.0055 1404.475 ZT4-7 1052.44 1052.44 1052.44 ZT8-11 976.3430000000001 976.3430000000001 976.3430000000001 ZT12-15 1234.85 1168.2649999999999 1301.435 ZT16-19 1447.1599999999999 1447.1599999999999 1447.1599999999999 ZT20-23 1641.165 1641.165 1641.165