condition mean min max ZT0-3 3312.8999999999996 3312.8999999999996 3312.8999999999996 ZT4-7 4481.8 4481.8 4481.8 ZT8-11 4568.5 4568.5 4568.5 ZT12-15 4673.1 4673.1 4673.1 ZT16-19 4404.0 4404.0 4404.0 ZT20-23 3924.8999999999996 3924.8999999999996 3924.8999999999996