condition mean min max ZT0-3 0.24445030025 0.0 0.4889006005 ZT4-7 1.8079428795 1.6939869305 1.9218988285000003 ZT8-11 2.7732816422499997 2.016780256 3.5297830285 ZT12-15 11.415137365749999 8.111694337 14.7185803945 ZT16-19 11.03805312125 10.3706471875 11.705459055 ZT20-23 11.53463524275 11.45884966 11.6104208255