condition mean min max ZT0-3 4071.8 4071.8 4071.8 ZT4-7 2736.6 2736.6 2736.6 ZT8-11 2891.75 2891.75 2891.75 ZT12-15 3881.7 3881.7 3881.7 ZT16-19 3852.4 3852.4 3852.4 ZT20-23 3858.25 3858.25 3858.25