condition mean min max ZT0-3 37.15 37.15 37.15 ZT4-7 18.0 18.0 18.0 ZT8-11 10.700000000000001 10.700000000000001 10.700000000000001 ZT12-15 31.7 31.7 31.7 ZT16-19 25.25 25.25 25.25 ZT20-23 52.3 52.3 52.3