condition mean min max ZT0-3 34.23005 34.23005 34.23005 ZT4-7 37.3234 37.3234 37.3234 ZT8-11 40.275000000000006 40.275000000000006 40.275000000000006 ZT12-15 41.1729 41.1729 41.1729 ZT16-19 41.963 41.963 41.963 ZT20-23 32.25435 32.25435 32.25435