condition mean min max ZT0-3 25.5187 25.5187 25.5187 ZT4-7 21.8429 21.8429 21.8429 ZT8-11 13.9511 13.9511 13.9511 ZT12-15 21.7965 21.7965 21.7965 ZT16-19 30.8646 30.8646 30.8646 ZT20-23 29.0163 29.0163 29.0163