condition mean min max ZT0-3 0.5367478587500001 0.469318365 0.6041773525 ZT4-7 0.4579202865 0.2382747465 0.6775658265 ZT8-11 0.7061422435 0.5824720395 0.8298124474999999 ZT12-15 0.9398633975 0.7501593245 1.1295674705 ZT16-19 1.13336011025 0.9946689820000001 1.2720512385 ZT20-23 2.3082108165 1.7572025095 2.8592191235