condition mean min max ZT0-3 138.073024 138.073024 138.073024 ZT4-7 81.4013305 81.4013305 81.4013305 ZT8-11 65.5257155 65.5257155 65.5257155 ZT12-15 94.2287235 94.2287235 94.2287235 ZT16-19 66.7001755 66.7001755 66.7001755 ZT20-23 86.6623955 86.6623955 86.6623955