condition mean min max ZT0-3 283.13988589999997 254.68343289999999 311.5963389 ZT4-7 308.857140425 287.77183855 329.9424423 ZT8-11 459.438384375 406.15622844999996 512.7205403 ZT12-15 694.4591982500001 681.8275582 707.0908383000001 ZT16-19 599.1942798 528.1472684999999 670.2412911 ZT20-23 352.638606225 322.19054264999994 383.0866698