condition mean min max ZT0-3 2.8834375000000003 2.422355 3.34452 ZT4-7 2.699375 2.699375 2.699375 ZT8-11 5.0088550000000005 5.0088550000000005 5.0088550000000005 ZT12-15 0 0 0 ZT16-19 5.157360000000001 5.157360000000001 5.157360000000001 ZT20-23 3.5187049999999997 3.5187049999999997 3.5187049999999997