condition mean min max ZT0-3 4.6247799999999994 3.55839 5.69117 ZT4-7 5.4844550000000005 5.4844550000000005 5.4844550000000005 ZT8-11 3.5021 3.5021 3.5021 ZT12-15 0 0 0 ZT16-19 3.60332 3.60332 3.60332 ZT20-23 3.33253 3.33253 3.33253