condition mean min max ZT0-3 1.0509815 0.8416855 1.2602775 ZT4-7 0.982016 0.982016 0.982016 ZT8-11 2.8567549999999997 2.8567549999999997 2.8567549999999997 ZT12-15 0 0 0 ZT16-19 3.44128 3.44128 3.44128 ZT20-23 1.83266 1.83266 1.83266