condition mean min max ZT0-3 25.45 25.45 25.45 ZT4-7 14.1 14.1 14.1 ZT8-11 26.650000000000002 26.650000000000002 26.650000000000002 ZT12-15 37.6 37.6 37.6 ZT16-19 20.25 20.25 20.25 ZT20-23 15.25 15.25 15.25