condition mean min max ZT0-3 262.8855 254.32500000000002 279.0295 ZT4-7 230.2935 230.2935 230.2935 ZT8-11 137.0805 137.0805 137.0805 ZT12-15 104.3769 97.3203 111.43350000000001 ZT16-19 103.68299999999999 103.68299999999999 103.68299999999999 ZT20-23 152.2585 152.2585 152.2585