condition mean min max ZT0-3 427.08285 427.08285 427.08285 ZT4-7 287.8533655 287.8533655 287.8533655 ZT8-11 376.03191549999997 376.03191549999997 376.03191549999997 ZT12-15 465.9244655 465.9244655 465.9244655 ZT16-19 798.7582090000001 798.7582090000001 798.7582090000001 ZT20-23 737.1436625 737.1436625 737.1436625