condition mean min max ZT0-3 15.168775409999999 12.55362145 17.78392937 ZT4-7 24.8385087875 16.91737442 32.759643155 ZT8-11 45.6112289125 38.959662905 52.262794920000005 ZT12-15 17.89889108025 7.6796093145 28.118172846 ZT16-19 5.5603174795 5.137643305999999 5.982991653 ZT20-23 4.6104325052499995 3.9585550649999997 5.2623099455