condition mean min max ZT0-3 1.8221353145 0.583171676 3.061098953 ZT4-7 0.5609961892499999 0.45117563399999994 0.6708167445000001 ZT8-11 0.36185578525 0.253095193 0.4706163775 ZT12-15 1.362985352 1.3594392655 1.3665314385 ZT16-19 1.2430313405 0.942224956 1.543837725 ZT20-23 0.6590992142500001 0.5711546465 0.747043782