condition mean min max ZT0-3 33.58865 33.58865 33.58865 ZT4-7 32.247550000000004 32.247550000000004 32.247550000000004 ZT8-11 29.235799999999998 29.235799999999998 29.235799999999998 ZT12-15 21.16655 21.16655 21.16655 ZT16-19 33.1596 33.1596 33.1596 ZT20-23 36.414199999999994 36.414199999999994 36.414199999999994