condition mean min max ZT0-3 0.8958478428500001 0.5786257611 1.1344500000000002 ZT4-7 2.22635 2.22635 2.22635 ZT8-11 3.94921 3.94921 3.94921 ZT12-15 3.128775 3.0941549999999998 3.163395 ZT16-19 2.197075 2.197075 2.197075 ZT20-23 2.3273099999999998 2.3273099999999998 2.3273099999999998