condition mean min max ZT0-3 0.01725615 0.0 0.0345123 ZT4-7 0.03510285 0.03510285 0.03510285 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0339688 0.0339688 0.0339688 ZT20-23 0.03392975 0.03392975 0.03392975