condition mean min max ZT0-3 105.62041666666667 101.7375 111.1745 ZT4-7 88.07255 88.07255 88.07255 ZT8-11 87.05985000000001 87.05985000000001 87.05985000000001 ZT12-15 76.42869999999999 74.33995 78.51745 ZT16-19 75.28235000000001 75.28235000000001 75.28235000000001 ZT20-23 89.97925000000001 89.97925000000001 89.97925000000001