condition mean min max ZT0-3 36.314069 36.314069 36.314069 ZT4-7 42.978730999999996 42.978730999999996 42.978730999999996 ZT8-11 42.969966 42.969966 42.969966 ZT12-15 49.1339945 49.1339945 49.1339945 ZT16-19 36.2226495 36.2226495 36.2226495 ZT20-23 30.4874365 30.4874365 30.4874365