condition mean min max ZT0-3 0.0225238 0.0 0.0450476 ZT4-7 0.04581845 0.04581845 0.04581845 ZT8-11 0.02288705 0.02288705 0.02288705 ZT12-15 0 0 0 ZT16-19 0.02208185 0.02208185 0.02208185 ZT20-23 0.02214365 0.02214365 0.02214365