condition mean min max ZT0-3 0.0775197 0.0775197 0.0775197 ZT4-7 0.0169227 0.0169227 0.0169227 ZT8-11 0.16942600000000002 0.16942600000000002 0.16942600000000002 ZT12-15 0.423404 0.423404 0.423404 ZT16-19 0.36822900000000003 0.36822900000000003 0.36822900000000003 ZT20-23 0.1388395 0.1388395 0.1388395